Is there a way to make chalkboard paint using oil paint instead of water based latex paint? I would add the unsanded grout of course , just 2 tbsps. to a cup of paint.
Sure, I don't see why not. I would even consider doing that with epoxy or LPU, which will clean off much better. The way an average Joe gets brush/rollable 2-part epoxy paint (without going to a chandlery) is garage floor paint.