u/IIIIIIIIlIlllIlllIlI

I bought a used bumper for my g and I want to re paint it however it had this protective film coating over it and once it was removed there is all this sticky residue left on it. It is very hard to remove. Would I be able to just paint over this residue? And if not does anyone have any ideas on how to remove it ? Thank you so much