Looks like this guy is using normal spray equipment.
As Chinese HVLP guns with a selection of air caps. material nozzles, and needles, are very cheap, why not have an HVLP gun as well as a cup gun? You will probably find the HVLP is better for some jobs, and the cup gun for others.
So classic
Do u think that any cup gun will do the trick? Im ready to start spraying gel coat at this point.
As I suggested in my previous post, HVLP guns are very cheap, so why not try one, as well as a cup gun?
If you want to surface finished parts say, then using Duratec clear, sprayed with an HVLP gun is going to be faster than spraying the same material with a cup gun, as the HVLP will atomisatise the thinner Duratec material better than a cup gun, provide a smoother finish, which means less final finishing.
Good advice, thanks! I know I’m going to have to step up and just get started… just so worried that I’m going to ruin any gun by letting the gelcoat go off in it. Any gun I might ruin (cheap or not) is going to hurt. 
Thats a very good reason for using a cup gun or in some cases a brush to apply gel-coat…
If you want to surface coat a finished part, with something like Duratec clear, then an HVLP gun is probably the best choice, as this will provide a better finish, and you will have a lot less sanding to do.
If you have larger moulds or multiple smaller moulds, used for GRP parts, gel-coat application by cup gun is the best choice.
Finally if you want to make limited numbers of parts using smallish moulds, then properly brushed gel-coat will work just fine, and save cost and clean up time.
I think that most people complaining about the cup gun are still using the #6 nozzle that comes with it. It works for unthinned gel coat and thick primers, but nearly impossible to avoid orange peel.
With #4 and #5 nozzles I can spray Duratec coatings or Gel Coat, with additive, and achieve a very smooth application. 20-25 psi helps.
Thanks guys… confidence going up!
Im going to buy the gun but wanted to ask:
Is the
ES g100 really a good gun? found here:
http://www.jamestowndistributors.com/userportal/show_product.do?pid=6835&familyName=ES+G100+Gelcoat+Spray+Gun+
Ebay actually has this gun for $120 which is a cheaper than jamestown distributors
I am comparing it to: the g200 which is externally mixed found here:
http://cgi.ebay.com/G200-6-External-Mix-Gel-Coat-and-Resin-Spray-Gun_W0QQitemZ300076157268QQcmdZViewItem
US COMPOSITES has them for 120 also
Hey…relax. You guys probably have the makings of a really good (cheap)gel coat gun laying around. Put one together. This is one I made many years ago. Still kickin…
You adjust the “pot pressure” to help push out the high viscosity
material.