I have to re glue the plastic scratch plate on my 12 string accoustic. 30 years ago I had to glue it on after it fell off and used Evo-Stik contact. Now it's fallen off again and I want to remove the old glue from the varnished wooden body to get a good contact. Will Evo-Stik Adhesive Cleaner also remove any varnish on the body if I stray accidentally? I'm also going to give the whole thing a good clean and would like to clean and brighten up the machine heads too. Any ideas on how best to do that would also be much appreciated. I think they're either chrome or nickel plated maybe.