I use Kurt's method. Like he said, you have to play with it a little but when the mixture is right it gives the most realistic look, plus its the quickest. I've seen so many faded look lettering jobs that just don't look like. Maybe it floats with the general public, but to an old signpainter it just looks wrong. BTW, I use HOK urethanes and to get the flat look, I leave out the hardner and it will dry flat on it's own. I cut it with a mixing clear.
I use overthinned lettering enamel, dry brush, and careful fine sandpapering. My own 1970 Chevy pickup has the logo of the dealership it originated from ( painted by yours truly ) and lots of people... more
Re: Faded/Weathered Looking Lettering George Perkins,Sun Sep 11 09:10