I just learned something! Only yesterday, I tried putting a custom red decal (laser-printed on clear decal paper) on a black car door, and to my dismay, the lettering completely vanished against the black background. Question: If I took the original (with a white background) and a sheet of white decal paper to the copy store, could they print a black background along with the red lettering? Or would the original also have to have a black background before I brought it to the store? Or is there an easier way to do this?