Methanol is a great solvent for cleaning the remnants of adhesive after removing a label, sticker, or anything else that leaves a sticky residue on metal or plastic. Unlike the rather aggressive product called GooGone, methanol is also safe on painted surfaces. It's also great for removing oily residues on parts before painting. But where to get methanol if you don't work in a lab? Easy peesey, its called HEET gas line anti-freeze and water remover and can be found for $2.00 or less on every auto parts store shelf in the country. I use it all the time, you should, too. I fucking love science!