I’ve found a way to simulate glass for photoetched-metal instrument gauges. I place clear tape over all the instrument faces. Trim the tape to fit the instrument panel, then glue the layer of photoetched metal over it.
I use 3M packaging tape because it is slightly thicker than Scotch tape and seems to have a more glass-like effect. However, the packaging tape is a little harder to work with.
Make sure the visible portions of tape are free from fingerprints and other smudges before installing it. Also, don’t extend the tape beyond the edges of the photoetched-metal panel.
Tip submitted by:
Steve BakFranklin, Wisconsin