Porcelain tub refinishing in San Clemente

When a tub starts peeling on the bottom, it’s the kind of thing you can’t miss. You step in one morning, look down, and there it is — a flake or two coming up from the surface, maybe an edge starting to lift. It’s an alarming sight, especially in a tub that’s supposed to be smooth and sealed. The instinct is to wonder if something’s wrong with the tub itself, but in most cases, the tub is fine. What’s failing is the coating sitting on top of it.

That was the situation with this San Clemente tub. The unit had been reglazed at some point in the past, and the bottom was now showing peeling. The owner had been keeping an eye on it for a while and decided it was time to get it taken care of properly before it spread any further. She also mentioned that the shower frame that used to mount to the tub had been removed at some point, and there was leftover silicone residue along the perimeter that needed to come off as part of the prep.

Before getting into how the job came together, there’s a quick distinction worth making. When people say “porcelain tub,” they usually mean a tub with a porcelain coating bonded to a cast iron body underneath. The porcelain is what you see and touch, but the body of the tub is iron. That distinction matters — most importantly, when the porcelain wears through or chips down to the iron, you can start getting rust. Cast iron tub refinishing and porcelain tub reglazing are essentially the same service for this kind of unit. We see a lot of these in older homes across Orange County, and they’re absolutely worth saving when they show issues like peeling or rust.

We started with the prep work. First step was pulling all the old caulking from around the tub. Then we got into sanding down the previous coating — both the bottom where the peeling had started and the rest of the tub where the old finish was still holding. Working through a previous reglaze takes its own kind of attention. The goal is a uniform, dull, matte surface across the whole tub with no glossy spots and no remaining loose material. Where the bottom had been peeling, that part actually came up pretty easily — once a coating has lost its bond, it’s already telling you where it doesn’t belong. We removed it cleanly and brought the whole tub down to a consistent base.

Next we worked the perimeter where the old shower frame had been mounted. Silicone residue from old hardware is something we deal with on a lot of jobs, and it always requires real attention. Silicone leaves a thin film that prevents new coatings from bonding, so we worked the affected areas until the surface was completely clean and ready for what came next.

After the prep, we did a thorough deep cleaning of the entire tub. Standard but essential — sanding dust, residue from the silicone removal, body oils, all of it had to come off before any new coating could go down.

Then we got into the rust repair. Next to the drain, there was a rust spot where the porcelain had worn through to the cast iron below and water had been reaching the exposed metal over time. The right way to handle this kind of repair isn’t just to sand off the rust and hope it doesn’t come back. We treated the spot with an anti-rusting gel first. The gel chemically neutralizes the active rust and stops the corrosion from continuing underneath whatever you put on top of it. Critical step — without that chemical treatment, even a great filler job is sitting on top of metal that’s still chemically active, and that’s a setup for the repair to fail later on.

Once the rust was neutralized, we filled the area with fiberglass filler. Fiberglass forms a hard, dense, waterproof barrier between the now-treated cast iron and any future water exposure. After it cured, we smoothed it flush with the surrounding tub surface so the repair would be invisible under the new coating.

With the repair complete, we masked the bathroom, set up our ventilation, and moved into the spray. We laid down our industrial-grade polyurethane coating across the whole tub — several coats, built up evenly, with full cure time between layers. Industrial-grade polyurethane is what you want on a tub that’s already lost one finish. It’s denser, harder, and longer-lasting than lower-grade coatings, and when it’s combined with proper prep, you get a finish that’s set up to do its job for a long time.

When the masking came down, the customer had a tub that looked brand new from end to end. No more peeling on the bottom. No rust spot by the drain. No silicone residue along the perimeter. Just a smooth, bright white, glossy finish that brought the tub all the way back.

If you’ve got a tub that was reglazed before and is starting to peel, lift, or show wear, that’s exactly the kind of project we’d be glad to take a look at. We handle porcelain tub reglazing and cast iron tub refinishing across San Clemente and the rest of Orange County, and stripping a previous reglaze and putting down a properly prepped new one is some of the most satisfying work we do.

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