instead of painting it, you should do the following
make the plexi larger than cutout
attach it with "cheap method" (screw, bolt, glue, velcro plexi to inside of case)
cut notches in the plexi near the edge (hidden from outside view)
place high powered led's in the notches aiming towards the etch.
it gives a nice glow on the etch, (same kind of method used on the mousepads in the link)
http://www.techimo.com/forum/showthr...threadid=53662
scroll to the ohio state one to see a better example