Can You Spray Paint Over Gelcoat?

What can I use to thin gelcoat?

Thin gel coat to your preferred viscosity using #70 Styrene Thinner or #1039 Duratec Clear Hi-Gloss Gel Coat Additive.

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..

Does gelcoat need hardener?

After tinting, add the catalyst to the gelcoat in the following proportions: 12 drops pf hardener per ounce of gel coat 11 cc of hardener per quart of gel coat 40 cc of hardener per gallon of gel coat The product cannot be used if the ambient temperature is below 60 F. … Gel times will vary with temperature.

How long does gelcoat take to harden?

2-4 hoursFinal thickness should be 12-15 mils minimum or the gelcoat may not fully cure. As soon as you are done spraying, clean your sprayer fully with acetone. Most re-sprayed gel coat will cure in 2-4 hours, although overnight cures are ideal.

Will automotive paint stick to gelcoat?

Anywhere that you are down to the fiberglass you need to use an epoxy primer or the paint won’t stick. But any good quality automotive clear should work. It’s all about the prep.

How do you paint over gelcoat?

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. So, the gelcoat on your boat is looking chalky and faded.

Do you need special paint for fiberglass?

Fiberglass can be painted successfully. You have to look at it as though you were painting plastic. … Paint: Topcoat with two coats of quality, exterior, 100% acrylic latex paint. To keep your steps from becoming slippery when wet, add non-slip sand texture additive to the topcoat.

What is the best kind of paint to use on fiberglass?

acrylic latex paintThe Sunrise Window company recommends an acrylic latex paint for fiberglass. Acrylic paint adheres well to fiberglass, overcoming one of the main challenges to painting this material. Acrylic paint is less likely to crack and blister, and will hold up well to cleaning.

What is the difference between paint and gelcoat?

(gelcoat is the top finish that you see on your entire boat.) Gelcoat is typically much thicker than a paint and is designed to protect the underlying fiberglass as well as provide a smooth shiny appearance. Be sure to leave the marine filler about 1/8″ lower than the surrounding gelcoat.

What kind of paint do you use to paint fiberglass?

A basic spray paint or latex-acrylic paint will do just fine on a decorative piece or a door. Polyurethane or epoxy paint are better suited to surfaces that will see a lot of heavy use, such as boats, bathtubs, and sinks. Polyurethane paint is ready to use.

Can you spray gelcoat with an airless sprayer?

I have a commercial electric airless sprayer like that, and used it to paint pools, about 3 pools a week. That type of equipment can work well, gel coat is almost 40% styrene already, so a bit more won’t create any more of a fire hazard, but you don’t need it, it will spray fine without it.

How do you resurface gelcoat?

Four Steps to Gelcoat RestorationStep one: Remove all surface dirt. To remove the surface dirt, wash your hull and topsides with marine boat soap diluted in water. … Step two: Remove the stains. … Step three: Remove the oxidation and restore the shine. … Step four: Protect the shine with a wax.

What is gelcoat crazing?

Gelcoat Crazing. If the surface of your boat looks like a cracked eggshell, the gelcoat is suffering from crazing (sometimes called alligatoring).

Does paint stick to gelcoat?

Absolutely.. there’s never been a need to ‘remove’ gelcoat but it needs to be dewaxed and thoroughly cleaned – a scuff sanding will help but no need to grind it all off. The crappy job is repainting over old paint – especially if you don’t know what was used the first time.

Can you spray over gelcoat?

Can You Spray Gelcoat Over Gelcoat? The short answer’s yes. But first, make sure the surface is free from dirt and debris. … That should remove debris and rough up the surface enough for new gelcoat to bond.

Can I use spray paint on fiberglass boat?

Unlike wood, fiberglass surfaces are nonporous, making them unsuitable for spray paint adhesion.

Can you gelcoat over old gelcoat?

First thing you want to do is look at the surface you want to apply gelcoat to. If the surface is already covered with gelcoat, or if the surface is a fiberglass, or polyester resin, then applying gelcoat will be a snap. If the surface is paint, then the paint would have to be removed before applying the gelcoat.

Does fiberglass need to be primed before painting?

You can start by using a primer, although it is not necessary with a fiberglass boat. … After you’ve applied one layer of primer, you can use a 300-grit sandpaper and lightly sand the boat before applying the next coat. You will want to begin painting within 2 hours of completing the primer for best results.

Does gelcoat need wax?

The first coat of gelcoat does not need the wax since you will apply a second coat. … All Gelcoats from the Bottom Paint Store come with the MEKP catalyst and wax additive sanding aid, but additional amounts can be purchased. If you don’t add a wax additive to the final coat (or only coat) of gelcoat it will not harden.

What is the best spray paint to use on fiberglass?

Rust-Oleum Automotive 10.25 oz. Rust Reformer Flat Black Spray Paint. … Rust-Oleum Automotive 12 oz. Self Etching Gray Primer Spray. … BEHR 12 oz. Black Flat Interior/Exterior Spray Paint and Primer in One Aerosol. … Rust-Oleum Automotive 11 oz. … BEHR 12 oz. … BEHR 12 oz. # … BEHR 12 oz. # … Rust-Oleum Automotive 12 oz.More items…

How do you apply gelcoat over fiberglass?

To apply the gelcoat with a brush, dip the brush in the gelcoat so there’s a liberal amount of gelcoat on it. Brush the gelcoat onto the fiberglass using short vertical strokes. Avoid spreading the gelcoat too thin or you’ll get stroke marks. You want there to be a thick, even layer of gelcoat on the fiberglass.