A few boats that I got to paint back in the day.... Unlimited Light UL-8.
2006 U-21 Miss Sympatico. Burned to waterline in Seattle. Boat was destroyed
2007 new build U-21 Freedom racing. Blew over in 2014
Let the light color dry first. You don't want the colors to bleed into each other. play around with the cardboard. vary the distance off the surface until you get the look you want. 1-2'ish works for me.
If you have a steady hand, you can hold a piece of cardboard about an inch off the surface, make a pass with darker color. Move it down and do it again. It gives a very straight blend line and keeps dark color from going everywhere. I use my detail gun to do it. I don't seem to have steady...
I used frisket film long ago in Advertising school that I went to. Great for airbrushing artwork. A lot of work though. I never thought about it for boat painting. Seems to work very well for you. I'll never forget, my teacher stuck frisket to a balloon, and cut a line down the frisket where it...
coud you put the red Coors on the boat and use 1/8th fineline tape exactly around rhe red? Spray the black, peel tape off the white paint and clear it. Will the Frisket give you a perfect edge like the fineline tape would?
Always fog on first coat. It always helps with incompatibility issues and sticks much better. Just think of what a pain in the A%$ it is to clean over spray off of something. "One good coat of paint" is never a good coat of paint.