Often asked: What Kind Of Paint Sprayer For Gel Coat?

Can I spray paint gelcoat?

Can You Spray Gelcoat Over Gelcoat? The short answer’s yes. But first, make sure the surface is free from dirt and debris. Using the window frame analogy again, you wouldn’t apply new paint over old paint without preparing the surface.

What psi do you spray gelcoat?

Set the gelcoat gun pressure to 20 psi. Pull the trigger to spray the gun, and quickly release. Observe the spray pattern on the paper. Increase the pressure to 30 psi.

Do I need to prime gelcoat before painting?

As gelcoats age they lose their luster and become chalky and porous. If the gelcoat is in good condition with no major cracking or crazing, the job is relatively straightforward—clean and prepare the surface, apply an epoxy primer, sand the primer, remove the sanding residue and then apply the topcoat.

How do you prep gelcoat for gelcoat?

Fiberglass Coatings

  1. Step #1 – You will want to start off by cleaning the surface with Lacquer Thinner to remove any wax and oil.
  2. Step #2 – Clean with Acetone or MEK Solvent and let the solvent dry.
  3. Step #3 – If you are doing multiple coats of gelcoat, the first coat should not have wax or Sanding Aid in it.
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How do I get a smooth finish on gelcoat?

Sand the surface of the fiberglass with 1,000 grit sandpaper. Sanding the fiberglass will help smooth out any rough spots in the gelcoat. If you’re sanding a large fiberglass surface, like the hull of a boat, use a random orbit sander to speed up the process. When you’re done sanding, wipe away any dust with a dry rag.

How do you spray gelcoat without orange peel?

Properly thinning the gel coat will prevent orange peel as well. In addition, many companies sell additives that can be mixed into gel coat to help create a smooth, even finish without undesired texture. If gel coat is applied using a spray gun, a suction spray gun creates less orange peel than a gravity spray gun.

Can I brush on gelcoat?

For applying your gelcoat, you can either roll the gelcoat on, like paint, or you can spray it on. We also sell a Brushable Gelcoat that can be applied with a brush. If you brush it on, be sure to use a solvent resistant brush. Your first coat will simply consist of the gelcoat and the MEK-P catalyst.

How thick should gel coat be?

Spraying gel coat is recommended for more accurate and consistent coverage. Apply gel coat in 4-5 layers at approximately 5 mils each, allowing 15-20 minutes between layers for a total thickness of 20-25 mils. Use #122-A Gel Coat Thickness to ensure proper thickness is achieved.

Can HVLP spray gelcoat?

Due to their reduced speed of spraying HVLP gel coat spray guns are often used for smaller touch up gel coat spraying work. You will have the choice between a HVLP gun where gel coat is mixed prior to putting it into the gun or one that allows for mixing of the catalyst after the material is sprayed.

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Can you gelcoat over fiberglass?

Incorrect Surface Preparation – Gelcoat will only adhere to fiberglass, previously cured gelcoat, or polyester resin. Do not apply gelcoat to any paint or protective coating because it will not adhere. Existing paint will have to be removed.

What is the difference between gelcoat with wax and without wax?

Gelcoat with wax has had paraffin wax added to it. Gelcoat without wax, or any other air dry product that has been catalyzed with MEKP, will generally harden, but remain sticky. More gelcoat or polyester resin can be applied directly over this and still form a chemical bond while it still has a tacky feel.

Is gel coat a paint?

Gelcoat is typically much thicker than a paint and is designed to protect the underlying fiberglass as well as provide a smooth shiny appearance. However, the nice thing about the gelcoat repair kits is that they come with tints so that you can try to match your existing gelcoat color.

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