I put on the panel letters, and I am very happy with how they came out! Glen at Reprographix did a beautiful job of replicating my labels and was a great help all the way thru the process!
There was a bit of a learning curve as I first did not use the backing paper while positioning the labels. I ruined two labels, but I had some back-up labels ready and once I figured out the best way to apply them, it was smooth sailing!
I did the light test on the new white labels, and they show up very well in white and red light.
This is the contrast between the darker panel and the white letters I was looking for. Did I mention I am happy with how they came out!
First pass - no backing paper used - got lucky
After removing two mistakes, using the backing paper and back-light