Its virtually impossible to make it adhere long term ( i'm the test bot on this one ) , the important issue is to sand as much of the sheen off as you can , this is way more important than primer or xtra coats , spend as much time as you can stand with a 500grit or higher wet sand .............2 coats of primer and 3-4 coats of top coat and at least 2 coats of clear coat ......................even after all this you might find chips after a few washings ( NEVER take it to a auto wash ) Good luck ( Plasti Dip with glossifier is more durable )