I just picked up a blue acoustic Art and Lutherie for my sister for her birthday in a few days. Here's the model ART & LUTHERIE DREADNOUGHT BLUE - Thomann Irish Cyberstore I picked it up 2nd hand and it turns out it's in a little worse condition than I'd hoped. There are some pick marks on the body, they aren't terrible but it's not ideal. I'm thinking there might be a way to clean it up a little before giving it to her. Any ideas what kind of stuff I could use that might clean it up a bit? I know I won't get it perfect but if I can improve the look that would be great. The specs say it's finished in a nitro satin and the finish seems pretty thin.