The testing on the epo foam (at least i think its epo, its the only scrap piece i have) did not go so well. It still melted the foam after 5 coats of spray on water based poly though not as bad as without the poly. When masking with the normal painters tape it pulled most of the paint off, the notepad again pulled no paint off while giving a mostly clean line. I think it would have been a cleaner line if you sprayed away from the painting line. I'm gonna try to find something that I know is epo foam and see what it does after six coats of poly