I've been grain filling an ash body. I have a few questions for any experienced finishers (I'm a complete amateur ) -How do you sand the inside of the horns? -Do you prefer Vinyl or regular nitro sanding sealer? -How many coats of Sanding Sealer would you do if spraying from an aerosol ? Here's where I'm at now - I sprayed a brown toner to help lock in the filler, then I'm sanding the lacquer off. What a pain.