mine was on there for a while, but last time i waxed, i was determined to get it off, so i splashed it with (zippo type) lighter fluid and scratched it off with my thumbnail... my car is light light gold (heathermist) and i didn't hurt it, but guess you may be able to see it on black if you scratch too hard... took a min or so, but after a few seconds, the glue got soft and gel-ish and came on off.