How to Paint a Bathroom Sink Countertop

How to paint a bathroom sink countertop and tub/shower/tile for a bright white makeover that lasts without demo.

As promised, here’s the full progress report and answers to questions about our hallway bathroom’s painted sink countertop.

A few weeks ago I shared a sneak peek on Instagram of the very start of this project. The reaction was a mix of excitement and skepticism — many couldn’t believe the dated beige cultured marble transformed into bright white with nothing more than paint.

UPDATE: I later shared how the painted bathroom countertop held up eight months after the project — spoiler: it proved to be durable.

I’m honestly amazed. What was once 1980s beige is now a crisp, clean white countertop and it makes the whole bathroom feel newer.

And then came the big reveal after painting:

The results were so encouraging I went on to paint the tub and shower as well. The bathroom is a tight space to photograph, but the difference is dramatic.

If you’ve missed earlier posts, our goal for this bathroom was simple: make it look completely different while spending as little money as possible. That meant using paint — lots of paint — for a budget-friendly refresh.

What you should know before painting a bathroom countertop

Be aware up front: I rate the Tub & Tile refinishing kit 4 out of 5 stars. It produces excellent results, but it’s not effortless. The product has strong fumes, and proper safety precautions are essential. We actually stayed elsewhere the first night so the bathroom could ventilate and the fumes could dissipate.

Even with that downside, I’m very happy with the outcome — it gave the space new life without a full demo.

DIY painted bathroom sink countertop

Supplies

• Rustoleum Tub & Tile Refinishing Kit (one kit covered my sink and countertop)
• Abrasive scrub cleaning pads
• Comet or similar abrasive cleanser
• Lime-A-Way or similar lime/mineral deposit remover
• 400-grit sandpaper
• Tack cloth
• Window scraper and a utility knife with fresh blades
• Mineral spirits
• Spray bottle with water
• Clean, dry towels
• Frog Tape or high-quality painter’s tape
• 1.5″ angled pro paint brush
• Foam roller and extra roller covers
• Small roller tray
• Respirator mask (do NOT attempt without this)
• Chemical-resistant gloves
• Safety glasses
• Box fan (optional but highly recommended for ventilation)
• Drop cloths
• White silicone caulk and a caulk gun

How to paint a bathroom sink countertop

1. Scrape off the old caulk

Using a window scraper and a utility knife, remove all old silicone caulk. Change blades frequently so you can get right down to the surface without tearing it. Wipe any remaining residue with mineral spirits.

2. Scrub the countertop and sink clean

Thorough cleaning is essential. Scrub the sink and countertop with Comet (or a comparable abrasive cleanser) using an abrasive pad. Rinse thoroughly with water from a spray bottle and dry completely.

3. Remove any residue

Spray and wipe the area with a lime/mineral deposit remover to ensure all residues and buildup are gone. Rinse and dry.

4. Sand to give the surface grip

Lightly sand the entire surface with 400-grit sandpaper to give the new coating something to adhere to. Use a tack cloth to remove all sanding dust before proceeding.

5. Tape off fixtures and edges

Allow the surface to air dry thoroughly, then apply painter’s tape around faucets, drains, and any areas you don’t want painted. If possible, remove the faucet for the cleanest result; if not, carefully tape around it.

6. Mix the refinishing kit and wear safety gear

The kit comes in two parts that you mix immediately before use. Put on a respirator mask, chemical-resistant gloves, and safety glasses. Open a window and run a box fan to direct fumes outside. Follow the kit instructions carefully when combining components.

7. Apply the paint to edges and detail areas

Use a 1.5″ angled brush to paint corners, edges, and rounded areas that a roller can’t reach. Take your time and make smooth, even strokes.

8. Use a foam roller for flat areas

Pour some mixed paint into a small roller tray and use a foam roller for the larger flat surfaces. Avoid overworking or brushing the paint; this product self-levels best when allowed to settle. Thin, even coats produce the smoothest finish.

9. Follow recommended drying times

Wait one hour between thin coats. I applied three coats total to achieve a solid white finish. Rushing or applying thick coats can lead to visible imperfections.

10. Remove tape and seal with silicone caulk

Once the paint is dry to the touch, remove the tape and seal all cracks and seams with white silicone caulk for a professional, waterproof edge.

11. Clean up any paint spots

If paint seeped under tape onto metal fixtures, remove it with Q-tips dipped in acetone or acetone-based nail polish remover. Work carefully to avoid damaging finishes.

12. Allow full cure time

Wait at least three days for the coating to fully cure before exposing it to regular water use. Longer cure times improve long-term durability.

After finishing the sink, I moved on to the tub/shower. I ran out of paint on the final coat, so that portion remained a work in progress until I completed it the following weekend.

How the countertop paint holds up

I plan to update this post with long-term wear notes, but initial results are promising. For this project, the painted countertop is a Phase 1 update while we save for a full demo and remodel in a few years. For a budget-friendly refresh, it’s an excellent option.

UPDATE: I later checked back eight months after the work and shared the follow-up to show how the finish performed over time.

We’re no longer surrounded by beige — the space already feels fresher. The last step in this phase will be painting the vanity cabinet, which I planned to tackle soon after.

Here’s a current view of the refreshed bathroom after these paint updates:

Have you painted a tub, shower, or sink? It’s a bold DIY, but once you do it, there’s no going back — it makes a huge visual difference for a small budget.

Frequently asked questions