Gel Coat Finish

Hello- How do you get this type gel coat finish - I have a spray gun w/ 2.5 tip ? Any advice would be greatly appreciated-

 

Welcome to the forum.

You are trying to achieve an extreme orange peel finish.

Lower your fan air pressure.
Narrow your fan
Use thicker gelcoat than normal
Use a minute amount of webbing solution in the gelcoat

Do lots of test samples with notes of air settings and mix ratios.

Good luck

 

Thank you sir

 

As mentioned, you need to experiment a bit. You can slightly thicken the gel coat with silica if it's too thin.

 

Thanks guys

 

You might want to look into using a viscosity cup.
It is a simple gravity device that permits the timed flow of a known volume of liquid passing through an orifice.


Check for manufacturer recommendation for the size of tip to viscosity of gel coat finish and the thickness of wet coats. Then keep a log of the viscosity, thickness, temp, humid etc...

Here is a Similar Threads on gel coat finish.
more gelcoat spraying-specific to gun/setup https://www.boatdesign.net/threads/more-gelcoat-spraying-specific-to-gun-setup.66329/

 

Thank you for the info.

 

Also use a really large tip and a gravity fed spraygun.

 

I have used this device for small (1sq ft )
Replace the plaster with gelcoat