DO NOT DO NOT use nail polish remover!!! It will disolve the clear finish--- older guitars for the most part, do not have acylic
finishes like their modern counterparts. I recomend a solution of warm water and a mild detergent like woolight or ordinary dish detergent. Use a very soft cloth to avoid scratches. If you're having trouble getting the glue off, put a small amount of the detergent dirrectly on the area and rub it in and let it sit for about 10 minutes. You will have to use good old fashioned elbow grease to completely clean your guitar. ALSO I wouldn't use any chemicals at all on any guitar EVER not even for polishing. Over time cleaners can start to discolor the guitar and oil or wax based polish can build up and star to dull the guitar instead of making it shine. The only time I would use any type of oil is for rosewood or ebony fret boards----and then only a small amout of
linseed oil. Also take it easy on "finger ease" or any other type of string lubricant or cleaners. Trust me this is good advice, I've seen many vintage and older guitars ruined in the name of upkeep and cleaning.