You can resurface a pool yourself in limited circumstances, usually small cosmetic repairs or manufacturer-approved DIY coating kits on a sound, correctly identified surface. Full resurfacing is a different matter. Plaster application, thermo-polymer coatings, and structural repair all require specialist equipment, controlled application, and experience that off-the-shelf products do not replace.
Contractor websites tell you never to attempt it. DIY forums tell you it is just prep and a coating. Neither is accurate.
Whether DIY makes sense depends on five things: what your pool is made of, what finish is on it now, whether there is structural damage, your groundwater conditions, and which coating system you plan to use. Get any of those wrong and the project fails, usually within the first year, and usually in a way that costs more to correct than doing it properly the first time.
What Pool Resurfacing Actually Involves
Resurfacing is not painting. That distinction matters, because most DIY resurfacing failures trace back to treating it as a coating job when it is really a preparation job with a coating at the end.
A complete resurfacing project includes draining the pool safely with groundwater accounted for, identifying the existing surface and any previous coatings, removing failed or contaminated material, repairing cracks and hollow spots, creating the correct surface profile so the new material bonds, applying the finish under appropriate conditions, and managing curing and startup.
The preparation stages account for most of the labor. They are also what DIY projects most often shortcut, because they are tedious, physically demanding, and invisible in the finished result. The coating gets the attention. The prep determines whether it lasts.
Step One: Identify What Surface You Actually Have
Before anything else, you need to know what you are working with. Applying the wrong preparation method or an incompatible coating system is one of the most common causes of DIY failure.
Plaster or marcite on a gunite or concrete shell is the most common surface on older pools. Cement-based, porous, troweled on.
Fiberglass shells have a gel coat surface. Gel coat is a resin layer, not cement, and it requires completely different preparation and coating chemistry. Cementitious products do not bond to fiberglass.
Pebble or aggregate finishes are cement with exposed stone, and require different removal methods than smooth plaster.
Previously painted surfaces are the biggest complication. Paint must generally be removed entirely before any durable coating is applied, because new material bonded to old paint is only as strong as the paint’s grip underneath. Pools painted more than once are significantly harder to prepare.
If you are not certain which you have, that uncertainty is itself a reason to get an inspection before buying materials.
The Draining Risk Most DIY Guides Skip
This is the part that deserves the most attention and receives the least, and it is particularly relevant in coastal South Carolina.
An in-ground pool full of water is held in place partly by the weight of that water pressing down against the pressure of groundwater pressing up from below. Drain the pool, and you remove the counterweight. If the groundwater table around the shell is high enough, hydrostatic pressure can push against the empty shell.
In severe cases, concrete pools can crack or lift and fiberglass shells can bulge or float. It is not common, but when it happens the damage is structural, expensive, and fast.
Most pools have a hydrostatic relief valve in the main drain designed to let groundwater in and equalize pressure. On older pools these are sometimes seized, blocked, or absent entirely. Draining without confirming the relief system works means taking a risk you may not know you are taking.
Why this matters more here. Large parts of the Charleston metro sit on high water tables. Johns Island, James Island, Daniel Island, portions of West Ashley, and much of the coastal Lowcountry have shallow groundwater. Add the rainfall this region receives during hurricane season and the timing of a drain becomes a technical consideration, not a formality.
If you take nothing else from this article: do not drain your pool without understanding your groundwater situation and confirming your hydrostatic relief system functions.
Preparation and Adhesion: Where Most DIY Projects Fail
Every resurfacing material bonds mechanically or chemically to the substrate beneath it. That bond is created during preparation, and it cannot be repaired afterward.
Professional preparation typically combines grinding or blasting to remove failed material and create profile, fully stripping previous paint or coatings, chipping out delaminated areas rather than coating over them, cleaning contamination such as oils, sunscreen residue, algae, and scale, opening and repairing cracks rather than bridging them, and bond coating where the system requires it.
The equipment is not typical homeowner equipment. Blasting requires appropriate media, containment, and PPE. Grinding produces silica dust, a genuine respiratory hazard requiring proper respiratory protection rather than a dust mask. Enclosed pool shells also create ventilation considerations for dust and coating fumes.
Practically, this matters because inadequate preparation does not look like a problem on the day the pool is filled. It looks like a problem in year one or two, when the surface delaminates or lifts in sheets. Removing a poorly bonded coating is often harder than the original preparation would have been.
Cracks: What Is Cosmetic and What Is Not
Not every crack is a structural problem, and it is worth being clear about that rather than alarming people.
Surface crazing is a fine, web-like pattern in plaster. It is common in aging cementitious finishes and is generally addressed during normal resurfacing.
Cracks that leak, widen at one end, appear at fittings or steps, or have displaced may indicate movement in the shell and need assessment before resurfacing.
A new surface does not repair structural damage. Coating over a moving crack usually results in it telegraphing through the new finish within a season. If your pool has been losing water, diagnose that before resurfacing, because the answer changes what work is actually needed. We handle structural surface repair as a distinct step before coating for that reason.
DIY Products vs Professional Systems
The materials available to homeowners and the materials used by professionals are not the same category of product.
Pool paint (epoxy, chlorinated rubber, acrylic) is genuinely DIY-applicable. It is also a thin film with a short service life, particularly in humid coastal climates where moisture migrating through the shell causes peeling from behind. On fiberglass especially, painting creates compounding problems, because each layer makes proper resurfacing harder later.
DIY coating and patch kits have legitimate uses for small cosmetic repairs. They are not designed for full-shell resurfacing.
Plaster application requires mixing and pumping equipment plus a coordinated crew working within a limited window. The equipment is not available at a rental counter, and troweling a curved shell with wall-to-floor transitions, light niches, and return fittings is a skill that takes time to develop. First attempts commonly produce a surface that is rough underfoot even when it holds water.
Thermo-polymer systems including ecoFINISH products such as aquaBRIGHT for concrete and gunite and polyFIBRO for fiberglass are applied with flame-spray equipment by trained applicators. These are not sold as consumer DIY products, and application is restricted to certified installers.
Warranty Considerations
Manufacturer warranties on professional coating systems generally require installation by an authorized or certified applicator. DIY application of a professional system, where the material can even be obtained, typically means no manufacturer coverage.
Before purchasing any resurfacing product, read the warranty terms and confirm what the manufacturer requires. Ask specifically whether homeowner application is permitted.
The Real Cost Comparison
DIY looks cheaper because the comparison usually counts materials against a professional quote. A fair comparison includes everything.
DIY costs to account for: materials and coating product, equipment rental or purchase, PPE including respiratory protection, draining and refilling, disposal of removed material, startup chemicals, and your own time measured in full days rather than hours.
Costs if it fails: removing the failed coating, re-preparing a surface now contaminated by failed material, new materials for a second attempt, and professional remediation, which is usually priced above an original resurfacing because the starting condition is worse.
The scenario worth thinking carefully about is not the DIY project that goes well. It is the one where the coating delaminates in year one and correcting it costs more than the original professional quote would have.
DIY vs Professional: Side by Side
| Factor | DIY | Professional |
|---|---|---|
| Initial cost | Lower materials cost, plus equipment and consumables | Higher quoted price, inclusive of labor and equipment |
| Equipment | Rental or purchase; some systems unavailable to consumers | Owned, maintained, system-specific |
| Skill required | Substantial for full resurfacing; moderate for small repairs | Trained and experienced applicators |
| Surface prep | Most commonly shortcut step | Defined scope, the majority of project labor |
| Time | Multiple full days, weather dependent | Typically days, crew-dependent |
| Groundwater risk | Homeowner assumes it | Assessed before draining |
| Finish consistency | Highly variable, especially on curves and transitions | Consistent across the shell |
| Durability | Depends almost entirely on prep quality | Tied to system specification |
| Warranty | Usually none on professional systems | Manufacturer coverage where applicable |
| If something fails | Your responsibility | Contractor and manufacturer responsibility |
When DIY Genuinely Makes Sense
To be fair about it, there are situations where a capable homeowner can reasonably do the work:
- Small cosmetic repairs such as a minor chip, a scratch in gel coat, or a localized patch using a manufacturer-approved kit
- Surface cleaning and stain treatment that does not involve recoating
- Manufacturer-approved DIY products on a surface you have correctly identified, in sound condition, with no structural concerns and no previous incompatible coatings
- Pools you are prepared to redo, where a shorter-lived result is an acceptable tradeoff
The common thread: limited scope, sound substrate, correct product, and realistic expectations about service life.
When to Bring in a Professional
Strong indicators that DIY is not the right path:
- You are not certain what your existing surface material is
- The pool has been painted, particularly more than once
- Cracks leak, have displaced, or appear at fittings and steps
- The pool is losing water and the cause has not been diagnosed
- Large areas sound hollow when tapped
- Fiberglass shows widespread blistering rather than isolated spots
- You are on a high water table or have not confirmed hydrostatic relief function
- The coating system requires certified application
Coastal South Carolina Factors Worth Weighing
Groundwater is the significant one, as covered above, and heavy summer rainfall raises water tables at exactly the time of year most people want the work done.
Beyond draining, the climate affects material performance. Strong UV across a long swimming season degrades surfaces faster than in milder regions, and coastal humidity and salt air accelerate wear on cementitious finishes and gel coat alike. A product that performs acceptably in a drier climate may underperform here, which makes correct product selection more consequential than a national spec sheet suggests.
Get the Surface Assessed Before You Commit
If you are uncertain about your existing surface, previous coatings, crack condition, groundwater, or which preparation your pool actually needs, an inspection before you buy materials is the cheapest step in the entire process.
We assess pools across Charleston, Mount Pleasant, Summerville, Daniel Island, James Island, Johns Island, West Ashley, Goose Creek, and the surrounding Lowcountry. The assessment is free and done on site. We will tell you what your surface is, what condition it is in, and what it genuinely needs, including when the answer is that you can wait.
Call 854-444-9416 or request an inspection.
Frequently Asked Questions
Can I resurface my pool myself?
For small cosmetic repairs or manufacturer-approved kits on a sound, correctly identified surface, yes. Full resurfacing generally is not practical for homeowners, because it requires specialist preparation equipment, controlled application, and in some cases certified installation.
Is DIY pool resurfacing actually cheaper?
It can be, if it works. A fair comparison includes equipment rental, PPE, water, disposal, chemicals, and your time, not just materials. If the coating fails from inadequate preparation, remediation typically costs more than the original professional quote.
Can I paint my pool instead of resurfacing it?
Pool paint is the most DIY-accessible option, but it is a thin surface film with a short service life, especially in humid coastal climates. On fiberglass it frequently peels within a few years, and each layer makes proper resurfacing harder later.
Can I resurface over old pool paint?
Generally no. Most durable coating systems require paint to be fully removed first, because a new coating bonded to old paint is only as secure as the paint’s own adhesion.
Can you resurface a fiberglass pool yourself?
Minor gel coat scratches and small chips can sometimes be addressed with manufacturer-approved repair products. Widespread blistering, cracking, heavy fading, or leaks call for professional resurfacing, because fiberglass requires different chemistry and preparation than cementitious surfaces.
How difficult is pool resurfacing?
Most of the difficulty is in preparation, not coating. Curved surfaces, wall-to-floor transitions, steps, light niches, and fittings are where inexperienced work shows most.
What happens if DIY pool resurfacing fails?
Typical failures are delamination, blistering, or the coating lifting in sheets within the first year or two. The failed material must be removed before a new surface can be applied, and that removal is often harder than the original preparation would have been.
Is it safe to drain my pool to resurface it?
It depends on your groundwater conditions and whether your hydrostatic relief valve is functioning. High water tables, common across the coastal Lowcountry, can put pressure on an empty shell. Confirm your relief valve works and consider timing relative to recent rainfall.