Gotten myself into a fine mess. I agreed to make up nearly 40 cabinet doors for my church kitchen project using 3/4" MDF with a routed ogee edge. Six 4x8 sheets of material. I googled "how to paint MDF". Nobody agrees on the best way to seal the faces and edges. Ten years ago I did a few for my son and I sealed the edges with thinned wood glue. Turned out ok, I might have sealed the faces with shellac. This time looking to spray the finish coat with my airless X5 using a cabinet grade satin latex acrylic from Behr or SW. Painting will be done in my garage heated with a ceiling mounted vented gas unit heater. Yes I am in Michigan and it will be a February project. Some recommend a lacquer sanding sealer, brushed on, others a shellac sealer, others automotive primer and so on. Not looking to get crazy with exotic materials like conversion varnishes and the like, just stuff available from the big box stores or SW. Worried about spraying lacquer or shellac due to it being volatile. I will use an automotive grade 3M paint respirator regardless of material. What say you?