Lacquer thinner will do the trick everytime. If any of you are in need of high quality Anti-Graffiti laminate that won't break the bank check out Vandal Guard anti-graffiti laminate. Graffiti such as paint and permanent marker wipe away easily from Vandal Guard using laquer thinner and a rag. It's a specially formulated polyester laminate that is dimensionally stable and can be applied over cast or calendared vinyl. 54" x 100' $249 & 36" x 100' $179.