I lost count of how many passes I've made with goo-gone in an attempt to remove all of the sticky residue from old dymo labels on my 212A board. Over time the stuff seems to have leeched right into the paint.
Same with my Gates BC1-T. Some dork at the broadcast station had affixed TWO identical 6" X 8" yellow "PCB Warning" notices to the front door of the transmitter (can't figure out why they thought one wouldn't have been sufficient). I managed to peel off the decals, but they left two rectangular impressions in the paint. I tried numerous solvents, and tried rubbing the surface with car polish, but nothing will take them off. Evidently, the glue in the decals combined chemically with the enamel. I think the technical term for this is polymerisation.
Don K4KYV
