How Do I Polish a Dulled or Scratched Acrylic Walk-In Tub?

Light scratches and dull areas on the acrylic of an Ella walk-in tub are polished out with a fine grade automotive polishing compound such as Turtle Wax, worked in small circles on a soft cloth, with the residue wiped off afterward. It works because the white on an Ella shell runs all the way through the acrylic sheet rather than sitting on top as a finish layer, so a dulled spot can be brought back rather than refinished. The product that causes most dulled patches is an abrasive, and Can I Use a Magic Eraser on My Walk-In Tub Acrylic? explains why a melamine sponge belongs nowhere near the shell.

Why an Ella Shell Can Be Polished Back

Every current Ella walk-in tub is built from a vacuum-formed acrylic and ABS shell, reinforced on the back with gel-coated fiberglass and bonded to a stainless steel frame. The team describes the acrylic as roughly 1/8 to 3/16 inch thick, and the white is part of the sheet itself. No fiberglass is used on the bather side, so the surface you sit on and clean is acrylic throughout. When a fine polishing compound works over a dulled area, what comes back is the same glossy white acrylic, because there is no separate finish layer to wear through.

A gelcoat tub is built the other way around. A thin sprayed gel coat is the bathing surface and fiberglass resin is built up behind it, so the finish you touch is the thin layer. That finish is described as brittle, it chips and cracks as the tub expands and contracts with hot and cold water, and a repair means fiberglass work. That difference is the reason the polishing advice on this page applies to Ella's acrylic and not to a sprayed finish, and Gelcoat vs Acrylic Walk-In Tub: Which Material Holds Up Better? lays the two constructions side by side.

First, Make Sure It Is a Scratch and Not a Film

A haze that looks like dulled acrylic is often soap scum or hard water film, and that comes off without any polishing at all. Work down this list before reaching for compound, using a soft cloth or sponge every time:

• Everyday film: mild dish soap, Dawn, Formula 409, or a 1 to 1 mix of white vinegar and water, then rinse and wipe dry.
• Soap scum or hard water film: Scrub Free Original Soap Scum Remover or Kaboom with OxiClean, following the product directions and rinsing well.
• Stubborn marks regular cleaning will not lift: denatured alcohol or an acrylic-safe bathtub surface cleaner, then rinse.
• Sticker glue, caulk or construction debris after installation: mild detergent first, then denatured alcohol or Clorox Soft Scrub, then rinse.

If the patch is still dull once the surface is clean and dry, or you can feel a scratch with a fingertip, it is a polishing job.

Polishing a Light Scratch or Dull Area

1. Clean and dry the area as above so no grit is dragged across the acrylic while you work.
2. Put a small amount of fine grade automotive polishing compound, such as Turtle Wax, on a clean, soft cotton rag.
3. Work it over the mark in small circles, keeping to the dulled area and the acrylic right around it.
4. Wipe off the residue, then rinse the area and wipe it dry.
5. Check the result in good light. A light scratch or a dull spot should have blended back into the gloss. If it has not, stop rather than press harder or switch to something coarser.

Ella's installation instructions for its one-piece shower stalls and tub-showers give the same method, an automotive polishing compound rubbed on with a clean cotton rag and the residue wiped off, and then add a coat of good-quality automotive paste wax buffed to a shine with a soft cloth and repeated every six months for easier cleaning. That waxing step is published for the shower fixtures. The walk-in tub guidance stops at the polishing compound and the routine non-abrasive wipe-down, so treat the wax as the shower routine and not as a tub instruction. Caring for Ella Showers: AcrylX Stalls, Gel Coat Units, SMC Bases, Niches, Teak Seats and the Flexible Dam has that routine in full.

The Textured Floor Is a Different Surface

Every Ella walk-in tub brochure lists a textured floor, and the textured slip resistant floor is one of the two entry safety features on every walk-in model. The polishing guidance above is written for light scratches and dull areas on the glossy acrylic, and nothing in Ella's published documents describes running polishing compound over the textured floor. The shower instructions are explicit on the related point: automotive paste wax must never go on the textured, slip-resistant standing surface, because a waxed floor raises the risk of a slip. A polished floor that has lost its texture would raise the same concern, so keep the compound to the smooth walls, seat and deck.

If the floor itself looks dull, start with the gentle cleaners in the list above, since hard water left to dry on a fixture can fade a finish over time and a wipe-down after use is the published habit against it. If the texture still looks worn or damaged after cleaning, open a ticket at ellasbubbles.com/support with your serial number and a photo in good light, or call your Ella dealer or the team at (800) 480-6850, rather than polishing it.

What Polishing Will Not Fix, and Where the Warranty Stands

Abrasives are the one thing that permanently scratches and dulls Ella's acrylic. Ella's cleaning guidance groups Mr. Clean Magic Eraser pads with scouring pads and scouring powders as products to keep off the shell, and the shower instructions add steel wool, scrapers and sandpaper to the same list. The damage is not always obvious on the first pass; what shows up later is a patch that has lost its gloss or a haze that rinsing will not clear. A fine polishing compound can often bring a small patch of that back, but the published finish warranty lists damage from scouring as an exclusion, so a scratched patch from a melamine sponge is not something the warranty repairs. Bleach and harsh chemical corrosives are the other things to keep off the shell for the same reason.

A deep gouge or a chip is not covered by the published polishing guidance, and this page will not guess at a repair. Send photos, your serial number and a note on what caused the mark through ellasbubbles.com/support so the team can advise on the right next step. Finally, keep chrome polish and metal cleaners such as Brasso or Bar Keepers Friend on the chrome jet trim only, because those products are for the plated metal and the acrylic around the jets scratches and dulls under them. How to Remove Water Spots and Stains From the Chrome Jet Trim covers the metal.

Related Guides

• Cracks or Stress Marks in the Acrylic Finish: How a Local Refinisher Repair Is Arranged
• Scratches, Scuffs, or Discoloration on the Acrylic: Surface Care and Touch-Up Kits
• What causes cracks in walk-in tub acrylic and how do I prevent them?

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