Witch one has more fill properties

[hugger6933]

Feather fill or slick sand? I use high build primer [a lot] and what I use is Omni grey MP282 and love it. Now I have one of my cabs on the flipper dolly and was thinking that if I had a heavy fill primer on the under side of the floor it would cover the floor better.I have heard that you can put a quarter say on a hood and spray three coats and bury the quarter. That was with the feather fill or slick sand I think one is regular high build and the other is a spray filler, I just don't know what is what since I do use a lot of the mp282 and am real happy with it. So, tell me what you think I would even like to hear what you do under the floor. Jim