This is the inside of a nightstand drawer, accross most of it. Only saw it using magnifying glass flashlight, not apparent to the naked eye.. Is not raised or shiny, can't feel it, and does not smear. No other evidence there- checked whole nightstand with magnifier.
http://imgur.com/z3S5inq
http://imgur.com/xNhEIfJ
http://imgur.com/a/mMsrB