the latex paint and the chalk paint came off pretty easily with just my fingernail
the paint came off pretty easily too, but not quite as easily as the section where I hadn’t sanded
the latex paint stuck for a scratch or two, but then it scratched away from the primer the chalk paint held up great on both and I couldn’t get it to scratch off
the latex paint scratched off just a tiny bit, no matter if it was sanded or not before priming the chalk paint hung onto the clear shellac for dear life