PSA doesn't like chemicals either. even if they can't detect them.
N-7 Evidence of Cleaning - When a whitener is used to whiten borders or a solution is used to remove wax, candy, gum or tobacco stains.
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My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
https://www.jamesspaethartwork.com/
He is available to do custom drawings in graphite, charcoal and other media. He also sells some of his works as note cards/greeting cards on Etsy under JamesSpaethArt.
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