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spray guns for gelcoat

Old 01-04-2009, 11:48 AM
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Default spray guns for gelcoat

I haven't shot gel in quite a while and discovered my touch up gun is pretty much worn out and corroded. For the little touch up jobs I do the standard style is fine if the gel is thinned just right. Should I spend the extra money on a gravity feed. For you guys who do it all the time is there a real advantage? Can you shoot a thicker product with a gravity feed.. do they spray more consistently. These are very small projects and I'm just looking for an inexpensive gun from Sears, Harbor freight or Home depot. Any suggestions would be appreciated.

thanks.
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Old 01-04-2009, 05:00 PM
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Default RE: spray guns for gelcoat

I use the E+S 100 dump gun. Very easy to clean.

http://www.shopmaninc.com/equipment.html
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Old 01-04-2009, 07:56 PM
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Default Re: spray guns for gelcoat

Thanks.
I like the design of that gun and easy to clean is very nice. It's a half disposable spray gun which eliminates one problem I tend to have... letting the batch start to kick in the gun.. making the container hard to clean. Doesn't look like it has a fan spray adjustment only volume. Nice price however.

Thanks for the reply.
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Old 01-04-2009, 08:00 PM
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Default Re: spray guns for gelcoat

thats a gun thats meant more for spraying striaght gel into a mold, not thinned gel for smaller repairs.

A cheap a=Astro gun with a 1.4 tip will spray what you need, even if it does kick in the gun there are very few parts in it making it easy to clean.
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Old 01-04-2009, 08:12 PM
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Default Re: spray guns for gelcoat

Something like this?

http://www.tools-plus.com/astro-pneu...term=ASTQUL105
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Old 01-05-2009, 06:23 AM
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Default Re: spray guns for gelcoat

Heres the one I use, and if you ruin it theres no great investment. It sprays gelcoat like a dream.

http://www.northerntool.com/webapp/w...9459_200319459
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Old 01-05-2009, 06:43 AM
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Default Re: spray guns for gelcoat

Will these guns work well for shooting Awlgrip? I never shot awlgrip before so it would be my 1st time. Plan on spraying my t-top and a transom gate. Thanks
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Old 01-05-2009, 07:40 AM
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Default Re: spray guns for gelcoat



The astro gun has 3 parts inside, needle,tip, and cap- no bushings no o-rings, etc..
You can get it in different tip sizes, but for general painting and gelcoat work the 1.4 is a good size to get. They sell larger tips, but they can get hairy for someone who does not spray alot of material.
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Old 01-06-2009, 05:41 AM
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Default Re: spray guns for gelcoat

sampson215 - 1/5/2009 9:43 AM

Will these guns work well for shooting Awlgrip? I never shot awlgrip before so it would be my 1st time. Plan on spraying my t-top and a transom gate. Thanks
They will. You would probably want a gun that holds more material for bigger jobs. You don't want to run out before you have even one coat on the item.

Lots of good suggestions here.... thanks.
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Old 01-06-2009, 07:40 AM
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Default Re: spray guns for gelcoat

Thanks, I've been reading over the awlgrip website for awhile now and they are very good for answering all the questions. They recommended using different guns and nozzles too. I don't plan on using a "professional" gun as I would only use it a couple times. Thanks for a good thread.
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Old 01-07-2009, 05:40 PM
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Default Re: spray guns for gelcoat

I'm picking up a inexpensive Vaper gravity feed with a 2.3mm nozzle to shoot a small project. I went with the 2.3 since using less Styrene is better and if the product is thicker you need less coats. What takes hours to prep takes seconds to shoot.

Matching your boats gel is an art.. so keep a sample when you make a cutout for electronics/etc and have it matched when you buy a quart or so.. I'm paying about $25 a quart color matched.
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Old 01-10-2009, 08:22 PM
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Default Re: spray guns for gelcoat

Wow, where are you getting the gel coat for $25? Spectrum wants $95 for my color. Do they ship?
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Old 01-11-2009, 05:52 AM
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Default Re: spray guns for gelcoat

$95 for a quart? that's a rip off. It's actually $18 for the quart and a $10 color match charge. Fiberglass coatings Inc. in Fort Lauderdale and a location in Stuart Fl. The place is a candy store for anything and everything that has to do with fiberglass. If you mail in a sample I'm sure they will ship the product to you.
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Old 01-11-2009, 11:55 AM
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Default Re: spray guns for gelcoat

I might have a gel coat card board cup gun laying in my garage. Probably the size you need? I think the cups are qts.I havent used it in years if you want it cheap$? PM me and Ill see if I still have everything.
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Old 01-11-2009, 01:49 PM
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Default Re: spray guns for gelcoat

debugger - 1/7/2009 5:40 PM

I'm picking up a inexpensive Vaper gravity feed with a 2.3mm nozzle to shoot a small project. I went with the 2.3 since using less Styrene is better and if the product is thicker you need less coats. What takes hours to prep takes seconds to shoot.

Matching your boats gel is an art.. so keep a sample when you make a cutout for electronics/etc and have it matched when you buy a quart or so.. I'm paying about $25 a quart color matched.
the problem with very thick gelcoat is that you distort the repair by putting it on too heavy, also make alot of work for yourself trying to sand the repair flat.
Trust me if I could spray un-thinned gelcoat on repairs I would be, but they come out terrible. Now and then I spray with a 2.0 gun for some of the thicker factory gelcoats because I dont like thinning them out TOO much, and they suck to sand out. Its also much harder to do smaller repairs.
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Old 01-11-2009, 09:36 PM
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Default Re: spray guns for gelcoat

Yes, shooting it unthinned makes for more wet sanding... depends on the job. I like to have a decent layer for sanding/buffing without burning through. Styrene tends to yellow light colored gelcoat as well.
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Old 01-12-2009, 01:24 PM
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Default Re: spray guns for gelcoat

its not that it makes for more wetsanding, its that it distorts the repair, it will not allow a repair to come out as good as it can, no block sanding will get rid of the ripples.

If you have your method then go for it.
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Old 01-16-2019, 09:15 AM
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Has anyone found a nozzle tip for a Harbor Freight HVLP Gravity Feed that will work with spraying gel coat?
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Old 01-16-2019, 09:21 AM
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Some people have succesfully drilled out the tip to 5/64 in order to spray gel. I will start experimenting with this myself pretty soon but don't have any first hand experience yet.
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Old 01-16-2019, 10:02 AM
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dump guns should be just that dumped in the rubbish , Last company I threw one out the back window of the workshop into a big pond never to be seen again ! BASTARD OF A THING !!

Pressure pot is the only system to use big you can spray a 40 foot hull , small can be used to do touch ups also smaller boats and are very versatile to do speckle spray gel coat no problem , paint no problem ,acrylic paints , enamel paints , lacquers 2 pot urethanes virtually any thing ! only change needed is the size of the pot 2 liter , or 6 liter both use the same GUN !
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