Restoring Acrylic Bathtubs: Wet Sanding for a Like-New Shine

Acrylic bathtubs are durable and beautiful—but over time, they can lose their shine due to scratches, soap scum, or chemical wear. Instead of replacing or re-coating, you can restore them with precision wet sanding and polishing. This guide explains how to safely sand acrylic tubs to a glossy, rejuvenated finish without damaging the surface.

Why Wet Sand Acrylic Tubs

Unlike enamel or porcelain, acrylic has a soft surface that responds well to controlled abrasion. Wet sanding removes oxidation, dull spots, and scratches layer by layer. With the correct grit sequence, you can achieve a uniform shine that looks factory-new again.

Tools & Materials

• Soft sanding block or flexible pad
• Microfiber towels and spray bottle with water
• Plastic polish or automotive finishing compound
• Non-abrasive cleaner (for pre-cleaning)
• Wet/dry sandpaper: 800 Grit (25-pack), 1500 Grit (50-pack), and 2000 Grit (100-pack).

Recommended Grit Sequence

• 800 grit: Removes stains, soap film, and shallow scratches.
• 1500 grit: Refines the surface, reducing micro-texture.
• 2000 grit: Prepares for final polishing and gloss restoration.

Step-by-Step: Sanding and Polishing Acrylic Bathtubs

1. Clean thoroughly. Remove all residues using a gentle cleaner and rinse well. Dry the surface completely to spot problem areas.
2. Start with 800 Grit (25-pack). Wet-sand using light, circular motions. Keep the area well-lubricated with water. Focus on dull or scratched sections first.
3. Move to 1500 Grit (50-pack). Sand gently over the entire tub to even out sheen and texture. Rinse frequently to check your progress.
4. Finish with 2000 Grit (100-pack). Polish the surface in small sections until it feels perfectly smooth. The tub should now have a uniform satin glow.
5. Buff to high gloss. Apply a small amount of plastic polish with a microfiber cloth or foam pad. Work in circular motions until a deep shine appears. Repeat if needed for mirror clarity.

Special Cases

For colored tubs, test on an inconspicuous area first to ensure colorfastness. Deep gouges may require a plastic repair kit before sanding. Avoid strong solvents—they can soften or discolor acrylic permanently. If sanding vertical surfaces, use smaller pieces of sandpaper for better control.

Pro Tips

• Always keep the sandpaper wet to avoid heat buildup and scratching.
• Work slowly and evenly—rushing can cause swirl marks.
• Use clean water and fresh paper for each grit change.
• Dry the tub completely before applying any polish or wax.

Aftercare

• Clean weekly with non-abrasive bathroom cleaner or dish soap.
• Apply wax or plastic polish every few months to maintain gloss.
• Wipe water after each use to prevent mineral deposits.
• Avoid scouring pads or bleach-based cleaners that can dull the surface.

FAQs

• Can I use a power sander? Yes, but keep speed low and pressure minimal to prevent melting or uneven sanding.
• Is wet sanding safe for fiberglass tubs? Yes—use the same method, but apply lighter pressure since fiberglass is more rigid.
• Do I need to reseal afterward? No sealant is necessary—just polish and maintain regularly.

Watch & Learn

Using 800 Grit (25-pack), 1500 Grit (50-pack), and 2000 Grit (100-pack) allows you to rejuvenate your acrylic bathtub’s surface—restoring brightness, eliminating scratches, and extending its lifespan beautifully.