[4-cam]

When I did my powder coating I painted the lettering by hand. I am no artist and am not that steady but it turned out very nice.
I used high temp engine paint from a spray can and a very thin artist brush. Have rags and q-tips handy. Spray a small amount into a small paper cup. The spray paint is very thin and flows well into the recess. Just dab the brush into the paint , then very lite into the recess. With just a little practice it will just flow with very little effort. Clean the edges with the q-tips as you go if you get a little paint on them. If the paint starts to dry, I was able go scrape it off with my finger nail while it was still soft. Dont let it dry to much or it will be difficult to remove. I also did mine in the spring time. The plenum and air temp was cooler and gave me more work time. It may be more difficult in th summer heat.

Good luck, I hope, this is helpful