Thanks for the heads up, we'll do some tests. Do you think this lifting would happen instantly, or could it happen even after a long time?I'd probably use fine steel wool or the synthetic stuff to smooth areas out. FYI the Rustoleum stuff is no acrylic or lacquer, it's enamel. I highly suggest testing the drawings on scrap painted just like the guitar. I suspect the acrylic might lift the enamel paint of the Rustoleum, no matter how much it has cured.