I have a Magma sizer so this actually takes longer than to lube and size. I figure if I can't do them in one coat it's not worth the effort except when maybe lead free is needed, I have never had big leading issues. That said I am doing them in one coat with just the powder. I found that adding acetone just made a sticky mess, I came up with that on my own not knowing others were doing it. I did a bunch with various epoxies and that seemed to cover in one coat as well. Just bought some corneal tweezers from LV that have points facing each other, very fine points, this way when they rotate to be base down there should be no loss or coating when I drop them on my cookie sheet, have not actually used them yet, you know about great ideas!!
Forgot to mention that my powder comes from 365 Powder in Canada. It is also free of some chemical that I forget the name of right now. Probably best to avoid it or we will be replacing lead with other stuff that may be worse.