How to Paint a Boat Bottom
- Scour brush
- Power washer
- Dewaxing solvent
- Clean rags
- Chemical paint stripper or scraper
- 80-grit and fine sandpaper
- Roller brush
- Antifouling paint
Step #1 – Priming Your Boat BottomBefore you paint a boat bottom, you need to clean and prime it. Remove your boat from the water and rinse the bottom. Use a hose to blast away any loose dirt. If there are barnacles or algae attached, you’ll need to use a scouring brush to scrub it loose. You won’t need any soap to get the boat clean. Just clean the bottom beneath the waterline. If you have hardened or stubborn grime, don’t be afraid to use your power washer. To remove the wax sealant, you’ll need to utilize a dewaxing solvent. Dip your clean rag into it and gently rub away the wax coating. Then, rinse it clean with another damp cloth. If the paint job is damaged, strip it away with a chemical paint stripper or scraper. If the paint is still relatively smooth, there’s no reason to remove the previous coating. Then, you’re ready to sand the bottom of your boat and get it ready for the primer. Use 80-grit sandpaper until you see a dull appearance to it. Once this is done, apply your primer with a roller brush. Once your primer is dry, use your fine grit sandpaper on the surface before you begin painting.
Step #2 – Paint a Boat BottomWe recommend antifouling paint to avoid growth on the boat. There are three varieties you can purchase:
- Ablative – designed for slower boats in constant use.
- Hard bottom – designed for faster boats or ones that don’t get used often.
- Hybrid – combine benefits of the other two and designed for fast, frequently used boats.
Final Thoughts on How to Paint a Boat Bottom
With these simple steps, anyone can learn how to paint a boat bottom. Just take your time and ensure that you do everything properly for the best results. In no time, you’ll be back in the water with maximum protection and a fresh coat of paint. While we're discussing your boat, consider replacing your carpet with Durabak.
Want to learn more? Check out our guide on the best paint for wood!