Spray-on is the oldest and most common way to refinish a bathtub: a thin epoxy coating sprayed over the prepared surface. It’s cheap and it does make a tub white again. Here’s how it’s done, what it costs you later — and why we don’t use it.
How spray-on refinishing is done
Spray-on has been around for decades. It’s affordable and simple, and a fresh white tub brightens the whole bathroom — but the process is longer than most people expect.
- Preparation. The water supply is disconnected, faucet and spout come off, the old coating is stripped. Chips, cracks, rust and dull spots have to be repaired first.
- Sanding and cleaning. The surface is sanded down to the base material with sandpaper or a drill and sanding disc, then cleaned and degreased so the coating can bond.
- Several thin coats. Epoxy is sprayed in multiple passes, each drying 15–20 minutes before the next. Some installers finish with a brush or roller to even out bubbles and bare spots.
- Long drying. After the last coat the tub must sit for 2–3 days in a warm, dust-free room. A speck of dust, debris or an insect landing on the wet surface stays in the finish.
Drawbacks of spray-on refinishing
Cheap on day one, expensive over time
- A week without a bathroom — with drying, the process can keep the tub out of use for close to a week.
- Short lifespan — usually 1–5 years before peeling, chipping or dulling sets in.
- Loses its shine — the gloss fades within the first year, even with careful use.
- Porous surface — absorbs stains, rust and mold, gets harder to clean and wears out faster.
- Strong fumes — solvent-based epoxy means a chemical smell and, often, moving out for a few days.
Why we pour, not spray
Pour-on enamel is the modern alternative. Instead of spraying, the coating is poured in a continuous stream around the rim and flows down the walls, self-leveling into one seamless, high-gloss layer — many times thicker than a sprayed coat. It restores even heavily damaged tubs.
- 10+ years of service instead of 1–5
- 3–4 hours of work, ready to use in 24 — not 72+
- No strong odor — nobody has to leave the home
- Non-porous finish that resists stains and microbes and wipes clean
Same starting price as a professional spray job — from $475 — but you refinish once, not every couple of years.
DIY spray-on refinishing
DIY spray kits exist, and they’re possible to use — with time, patience and precautions. The room must be ventilated and you’ll need protective gear; expect strong fumes and long drying. The result depends almost entirely on surface prep and on mixing the coating and hardener exactly right.
The bottom line
If budget is the only concern, a DIY spray kit is an option. If you want a tub that stays glossy for a decade with no maintenance, professional pour-on refinishing is the better investment.
