I designed and installed…
I designed and installed stainless steel transport truck accessories for the largest manufacturer in North America for 10 years. CAT came out with a truck with a stainless grille surround and left the plastic on till they were delivered. Every truck was left with residue that wouldn't come off without a proper buff. Not a simple solution, but the only true solution is to bring it to a polisher and pay the money to have them buff it. Heavy truck guys do this all the time and there's lots of shops around that do this.