Astrong dislike for carpet compelled me to gelcoat the interior surfaces of my Miller. Sprayed it w/ an inexpensive hvlp from Fibreglast in Ohio. Has a 2.5 tip. I mixed 10 parts white to 1 part blue pigment & got fairly close to the boat's primary color. Used a diferent gun with a 1.8 tip to spray the Duratec hi gloss topcoat.
I've got the last of the clear sprayed, waiting for it to cure enough to wetsand & polish.
Here's some pics before, during, and after spraying clear.