I am probably the last person to find these but one of the most useful things in my old Barth is a Mr. Clean Magic Eraser. Even took off old glue-epoxy stains that may have been there since it was built.

My wife LOVES those magic erasers, and has used them for years with great success. They are a bit abrasive (it's part of how they work) and will take lettering & printing off of plastics, so be aware of that!

Also Walmart sells a store brand that works just as well.