How to Apply a Gel Coat

Save

Gel coat is a thick paint made from fiberglass resin. Pigment is added to the gel coat to match any color. Fiberglass requires a catalyst in order to harden, and because gel coat is fiberglass, it, too, will need a catalyst to harden. Because of the consistency of the gel coat, you must spray it from a special spray gun. You can also paint gel coat with a regular paint roller, but you won't get a professional finish this way. You can find fiberglass and gel coat materials at your local marine supply store.

Things You'll Need

  • Fine-grit sandpaper
  • Palm sander
  • Air compressor
  • Rag
  • Acetone
  • Painter's tape
  • Small bucket
  • Stir stick
  • Gel coat
  • Hardener (methyl ethyl ketone peroxide)
  • Gel coat spray gun
  • Scuff the fiberglass to be painted using fine-grit sandpaper and a palm sander. Sand any rough spots on the fiberglass until the entire surface is smooth and scuffed.

  • Plug in the air compressor, and blow all the dust off of the fiberglass. Clean the surface using a rag and acetone. This removes any grease or oil residue that can cause the gel coat to bond poorly or not at all.

  • Cover any decals or windows with painter's tape. This prevents overspray from getting in the wrong places.

  • Mix the gel coat and hardener as directed using a small bucket and a stir stick. Add the paint to the spray gun as instructed in the spray gun manual.

  • Spray the first coat of gel coat onto the fiberglass in a heavy mist. For the best results, apply the gel coat as evenly as possible. Let the first coat begin to harden, and then apply the second coat.

  • Spray the second coat of gel coat onto the fiberglass, solidly covering the surface. Continue to spray as consistently as possible to avoid any runs. Let the gel coat cure until it's fully hardened.

References

Promoted By Zergnet

Comments

Resources

You May Also Like

  • How to Brush Gelcoat on a Boat

    Gelcoat is the resin finish applied over any fiberglass structure to give it a protective coating. For a boat, this finish protects...

  • How to Size and Select an Air Compressor

    Your air compressor is a source of power. Whether you're a weekend hobbyist or a business owner, you need the right size...

  • How to Spray Gelcoat

    Gel coat consists of polyester resin that's pigmented to match any color needed. Gel coat is used on fiberglass applications such as...

  • How to Gel Coat a Boat

    During a boat's normal course of use, it tends to accumulate dings and scratches. Flotsam and detritus in the water can scrape...

  • How to Gel Coat Paint

    Gel coat is a polyester resin based paint that is pigmented with color and infused with different additives for extra strength and...

  • How to Apply a Clear Gel Coat to a Fiberglass Boat

    Constant exposure to wind, water and sun can wear down your boat's protective gelcoat over time and you'll soon find you need...

  • How to Use a Paint Roller to Spread Gelcoat

    Gelcoat is a polyester resin that contains color pigments and additives that control flow. There are two basic types of gelcoat: general-purpose...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!