Best sealant for a plaster of paris ashtray so that the latex paint underneath does'nt burn?
I’m making ashtrays out of plaster of paris and painting them with latex paint. I need a sealant that is thick and can withstand the heat/burn of a cigarette being put out on it without burning through the sealant and ruining the paint. If you’ve got any ideas or experience please let me know what [...]