i got the ACE VM&P Naptha Pure from Ace Hardware and read online that it leaves no residue. however, i recently read one that said it did leave a residue... if it does leave a residue what would it look like? i just want to make sure this Naptha is actually pure like it says on the can. thank you!

Drop a tiny amount on a piece of glass and let it evaporate. If it leaves no trace, you are good to go.