Pat,
I put my letters and emblems on right after it was sprayed, before the paint was cured, but under the clear.
I took a chance doing this, but I wanted the letters to crinkle somewhat. My painter was trippin out. He said it was gonna guy that had a good time the whole paint job. I told him that I would pay his price to redo it, if it messed up, but to let me do it.
It lifted big time, I was almost in trouble. I brought it home and layed it out in the yard, in the sun. It sucked up nicely, just the right amount of "crinkle". I wanted something different, and as luck would have it, it came out great!
I was reminded of this, because I noticed how nice and smooth your letters are. How long did you wait between the last coat of candy, till you applied the stickers, and then the clear?
Here's a halfassed pic of the lettering.
It looks like I cut them out of a Nestle's crunch bar wrapper. It's the same mirror/chrome letters that you have, but with the "crinkle" added.
Also, mine is green/green, not green/black. You can about only see it in person. It doesn't photo good.