How To Bottom Paint!

Bottom painting your boat helps protect it from marine growth and keeps the hull in good condition. Here’s a step-by-step guide to doing it yourself:

Tools & Materials Needed:

  • Paint scraper or sander
  • Power sander (if needed)
  • Safety gear (gloves, mask, goggles)
  • Painter’s tape
  • Drop cloth or plastic sheeting
  • Solvent (to clean hull)
  • Primer (if needed)
  • Antifouling bottom paint
  • Paint roller (short nap) & brushes
  • Mixing sticks & paint tray

Step 1: Prepare the Boat

  1. Haul Out & Block Up

    • The boat must be out of the water and supported properly on blocks or stands.

  2. Clean the Hull

    • Power wash or scrub the hull to remove marine growth, dirt, and old loose paint.

  3. Remove Old Paint (if necessary)

    • If the existing paint is in bad shape, scrape and sand it down to a smooth surface.
    • Use 80-grit sandpaper to roughen the surface for better paint adhesion.

Step 2: Prep for Painting

  1. Tape Off the Waterline

    • Use painter’s tape to create a clean edge along the waterline.

  2. Apply Primer (if needed)

    • If switching paint types (e.g., from hard to ablative), apply a compatible primer.

Step 3: Apply Bottom Paint

  1. Stir Paint Thoroughly

    • Antifouling paint contains heavy biocides that settle at the bottom.

  2. Apply the First Coat

    • Use a roller for larger areas and a brush for edges & tight spots.
    • Work in even, overlapping strokes.

  3. Let It Dry & Apply Additional Coats

    • Most bottom paints require 2 coats for full protection.
    • Check the manufacturer’s recommended drying times between coats.

Step 4: Finishing Up

  1. Remove Painter’s Tape Before Paint Fully Dries

    • This ensures clean, sharp lines at the waterline.

  2. Let the Paint Cure

  • Follow the manufacturer’s recommended drying time before launching.

Additional Tips:

✅ Choose the Right Paint

  • Hard Paint: Best for fast boats, dry storage, or trailered boats.
  • Ablative Paint: Best for boats left in the water, as it wears away over time.

✅ Check Local Regulations

  • Some antifouling paints contain chemicals that are regulated in certain areas.

✅ Plan for Jack Stand Areas

  • After the paint dries, move the jack stands and touch up those areas.
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