saw it in a trade mag a year or so ago at my shop. damn, make that 2 or 3 years ago. anywho, you put the film up to the raised letters on the sidewalls and press it firmly. then pull the backing off and only the parts you pressed hard against the letters stays on. they had a few different colors. looked like itd work, but ive never seen it in person. and i forget the name of the company, sorry. but there is stuff out there