Originally Posted by
FarHorizon
since printers (almost universally) can't print white, using any white in the decal is probably a non-starter.
A few years ago I helped a friend fabricate a 30's era speedometer face with white on black letters. I used white waterslide decal paper and it came out very nice. Might be worth a trip to Staples for a practice sheet to see if the quality meets your standard.
DecalPaper.com - Decals - Waterslide decal paper or inkjet,laser printers Alps & copiers
A quote from the above link....
For white lettering / white artwork / white paper users:
In order to print the color "white" successfully you will either require an ALPS printer that has the ability to print opaque white, or our high performance WHITE DECAL PAPER. If you do not have an ALPS printer, do not worry; this alternative product is perfect for you. Now you can use our BEL INC white decal paper and get the same excellent results for all of your artworks that include the color white.