Shot the red first, then white, and finished with black, baked to flow between colors. I cobbled together a mini-vac with some vacuum tubing a frapuchino cap, some fittings and a ball needle. My spray booth was a recycle bin with some electric fence wire strung across. Toaster is a cheap $10 deal from good will. The thermometer wouldn't fit in the oven with the part, so bake temps were a guess. Testing just the oven with a thermometer showed swings from 350-450, not the most stable out there.
I was able to use the mini-vac with great success to remove all of the overspray that wasn't on the letters. Wiping the letters after coating the black was an exercise in precision and patience. There are a few burs that could be sanded/filed and one smudge where I got a little overzealous wiping off the letters. I may repair these and reshoot the black. the blemishes can't be seen from five feet, but are visible holding it in your hands.
Original
After shooting red
Partially cured red
After shooting white
After shooting black, partial wipe
After shooting black, full wipe
Fully cured
