Switched my plates yesterday, car was a pre-reg from England and local dealer wanted to fit their plates with their name, took the easy for them route, pulled the original ones off, didn’t bother removing the residue of the sticky tabs, just added some more and drilled into the body to add screws (hate screws). Best way to remove residue, and
pre - fitted plates I find is tar remover in an atomiser bottle, for plates in situ, few sprays down the back, leave for 10 minutes, should just peel off, for residue, spray, leave, wipe. Comes up a treat.