I’d like to paint birch plywood before engraving but I understand I need to prime the wood first. The primer that I have contains polyurethane. Does anyone know if that’s safe to laser? Or can someone recommend the primer that they use? Thanks
Lots of discussions on the safety question, just search for “polyurethane safe” in these forums, e.g.:
I have done this, but make sure it’s completely dry! I usually wait a few days to make sure before using it.