Oxidation Removal & Gelcoat Polishing
Chalky gelcoatbrought backfrom the dead.
Oxidation is gelcoat that has been broken down by UV until the surface turns porous and chalky — the powder that comes off on your hand. It cannot be washed off or waxed away. It has to be physically cut back to fresh gelcoat with machine compounding, then refined and protected. Done right, a boat that looks finished comes back to a wet gloss.
- 1–3 stage correction
- Gelcoat & painted hulls
- Wet-sanding available
- Protected on completion
What oxidation actually is
Gelcoat is a pigmented polyester resin surface, and UV attacks the resin binder holding the pigment together. As the binder degrades, pigment particles are left loose on the surface — that's the chalk. The surface also becomes microscopically porous, which is why an oxidised hull grabs dirt, stains instantly and won't hold wax.
The important thing to understand is that oxidation is depth. Light oxidation is a few microns of surface haze. Severe oxidation on a ten-year-old dark hull can be deep enough that no amount of polishing brings it back and the correct answer is paint or a gelcoat re-shoot. We test-spot before quoting precisely so nobody pays for a correction that can't deliver.
How we grade a hull
| Grade | What you see | Process |
|---|---|---|
| Light | Slight dullness, wax won't last | One-stage polish + protection |
| Moderate | Visible haze, chalk on a finger swipe | Compound + polish (2-stage) |
| Heavy | Uniform chalk, colour looks faded | Cut + compound + polish (3-stage) |
| Severe | Chalk plus staining, dark hulls gone pastel | Wet-sand 1000–3000 grit, then 3-stage |
| Terminal | Correction exposes fibre or fails to gloss | Paint or gelcoat restoration — we'll tell you |
The correction process
1. Test spot
A small area is corrected to the target finish so you can see the result and we can quote the real number of stages instead of guessing.
2. Decontamination
Acid waterline treatment and chemical decon. Compounding over embedded contamination just drags grit across the hull.
3. Wet-sanding (severe cases only)
Progressive grits, kept flooded, used to knock down deep oxidation faster and with less heat than a compound can. This removes material — it's a once-or-twice-in-a-boat's-life step.
4. Compounding
Rotary with a wool or heavy foam pad and marine compound, worked in controlled sections with pad temperature managed so gelcoat doesn't burn.
5. Refining polish
Dual-action with a finishing pad to remove compound haze and holograms and bring the true gloss up. Skipping this is why some 'polished' boats look hazy in sunlight.
6. Protection
Wax, sealant or a ceramic coating. Do not leave freshly corrected gelcoat unprotected — it's at its most vulnerable and will re-oxidise faster than before.
Why the protection choice matters more after correction
Every correction removes a measurable amount of gelcoat, and gelcoat is typically only 15–25 mil thick from the factory. A boat can survive a handful of full corrections across its life — not one every year. That makes what you put on top of a correction the most consequential decision in the whole job.
A wax buys you weeks. A sealant buys you months. A ceramic coating buys you years, and in practical terms it's the difference between correcting once and correcting repeatedly. On a corrected hull we almost always recommend coating, because you've just paid for the surface — the coating is what keeps it.
Beyond the hull
- Oxidised hardtops and radar arches — the worst UV exposure on the boat
- Faded non-skid restored with dedicated cleaners rather than filled with polish
- Chalked black rubrail and trim restored with trim-specific product
- Stainless tea-staining removed and sealed
- Yellowed isinglass polished with plastic-safe compounds
- Cloudy gelcoat around fittings where salt has been running for years
What it costs
Correction is quoted per foot and per stage after a test spot, because two boats of the same length can be a one-day job and a four-day job. Pricing below is the starting point for hull sides on a boat in average condition.
- One-stage polish & protectup to 25ft, +$26/ft overfrom $650
- Two-stage compound & polishup to 25ft, +$38/ft overfrom $1,150
- Three-stage heavy oxidation removalup to 25ft, +$60/ft overfrom $1,650
- Wet-sand + full correctionQuoted after test spot
Questions people actually ask
Can badly oxidised gelcoat always be saved?
Not always. If the oxidation is deeper than the remaining gelcoat can afford, or if correction stops producing gloss during the test spot, the honest answer is paint. We tell you that before you pay for a correction, not after.
How long will the result last?
The correction itself is permanent — the gelcoat is genuinely restored. How long it stays looking that way is entirely down to protection and washing. Unprotected, a corrected hull in Florida hazes again within a season. Coated and washed regularly, it holds for years.
Is polishing bad for my boat?
Done correctly and infrequently, no — it's normal maintenance. Done aggressively every year by someone using the heaviest compound on the shelf, yes: you run out of gelcoat. That's why we always start with the least aggressive method that achieves the result.
Do dark hulls oxidise faster?
Yes. Dark gelcoat absorbs more heat and shows loss of gloss dramatically earlier. Black and navy hulls in South Florida should be coated, not waxed — the maintenance gap between the two is enormous on dark colours.
Can you fix the chalky black rubrail too?
Yes, and we usually do — restoring the hull and leaving grey, chalked trim next to it undoes half the visual effect.
Related services
A professionally applied ceramic coating puts a hard, chemically bonded layer over your gelcoat, paint, stainless and glass. Salt rinses off instead of etching in, waterline scum releases with a wipe, and UV hits the coating rather than the pigment underneath. Done correctly in a controlled prep, it lasts years — not the weeks you get from wax.
Read moreMobile boat detailing across Fort Lauderdale, Las Olas, Harbor Beach, Coral Ridge and the New River — from a maintenance wash between weekends to a multi-stage gelcoat correction on a boat that has spent two summers baking in the sun. We come to your dock, slip or dry storage with our own water, power and product.
Read moreA scheduled wash program is the single highest-return money you can spend on a boat. Salt that gets rinsed off every two weeks never etches. Waterline scum that never sits never needs acid. Gelcoat that stays protected never needs compounding. This is the service that stops you paying for the expensive ones.
Read moreYou lookgood on aclean boat.
Send photos, tell us where she's kept, and we'll come back with a real number.
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