The '55 Eldorado I am working on had a modified interior from the previous owner. One of his "improvements" was to cover the Eldorado badges on the sides of the seats. The adhesive was on the lens to hold the leather cover. I bought some 3M adhesive remover and a headlamp polishing kit. That worked well. I polished by hand just to be careful. I did not take a photo before I completed the 1st one, but it was the same as the one not cleaned yet. The remover took off most, but it was not completely free of residue.