Often asked: How To Use Fibre Glast Gel Coat Sprayer To Spray Paint?

How do you mix gelcoat for spraying?

When using styrene thinner, add to gel coat at 2-5% to lower viscosity and aid in spraying. Duratec Clear Hi-Gloss Gel Coat Additive is added at a 1:1 ratio. For all applications below the water line, add #71 Styrene Wax at 5% and mix thoroughly. Catalyze gel coat with #69 MEKP at 1.5%.

Can gelcoat be sprayed over paint?

Gelcoat should not be applied over paint, wood, metal or concrete. It usually will not adhere to these surfaces. Gelcoat will not fully cure without adding a surfacing agent or wax additive sanding aid.

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.

Can you spray gelcoat without thinner?

For spraying gelcoat our FGCI brand does not recommend thinning. If thinning is needed for gun/nozzle used then Patch Booster is a additive that will thin out gelcoat and not affect colors, such as acetone or styrene.

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How do you fix worn gelcoat?

Four Steps to Gelcoat Restoration

  1. Step one: Remove all surface dirt. To remove the surface dirt, wash your hull and topsides with marine boat soap diluted in water.
  2. Step two: Remove the stains.
  3. Step three: Remove the oxidation and restore the shine.
  4. Step four: Protect the shine with a wax.

What is the purpose of gelcoat on fiberglass?

Gelcoat is a liquid that hardens to form a thick layer that’s used to protect fiberglass and give it a shiny, smooth finish.

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.

Do you need a special spray gun for gelcoat?

Ultimately a proper gel coat spray gun will significantly improve your gelcoat application. For large repair work it can often make sense to consider the air assist airless gel coat spray gun. Finally, for smaller jobs a basic air spray gun may be all that is needed.

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.

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How can you tell if paint is gelcoat?

If the surface is scratched gelcoat is the same color throughout; if the surface has been painted when scratched it will show what is underneath.

Does gelcoat need hardener?

( Colored GELCOATS can require upto DOUBLE the amount of hardener shown. When temperatures are above 85, regular ratios should be used.) Please note: When using Surfacing Wax with your resin/gelcoat, you must also add the MEKP(Hardener). In temperatures below 70 degrees, the paraffin can solidify in the bottle.

How much does it cost to redo gelcoat on a boat?

Average Cost Estimate to Re-Gelcoat a Boat So, if you are getting professional, they might charge you around $300 to $500 per foot for the entire process. One-third of the cost is for the materials, and the rest two-third is the labor cost.

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