We are preparing to prime interior walls using a shellac-based primer, followed with a setting compound mud. Will the mud stick adequately to the shellac-based product or do we need to use another type of primer over the shellac primer?
I’ve done a lot of small projects doing this exact thing but never whole walls. However, I would do at least two coats of primer (natural Shellac is best) and then sand (220 grit) and wipe the walls down with a damp (not soaking wet) cloth and then allow to dry well before plastering. *You may need to rinse / wring the cloth a few times depending on how much dust you’re picking up.