Interesting.... I just ordered a very thin sheet of white rubber for like $8. I am going to toy around and see what I can do with my dye cutter. I will try it on some old tires. I will test it and see that it does not look tacky, and blends in well, and does not look like a sticker on the tire. If this is the case, it could be kinda cool to have "FIERO GT" on the tires.
It is certainly a matter of preference, but I have always liked / preferred tires with white lettering on them.