Ok, I'm going to do something very unusual on the 'bolt, I'm going to try to post a reply that is on topic. :p
First, welcome to the Stovebolt.
You'll probably get a variety of opinions here, but this is what I did. After getting my frame sandblasted, I took a few weeks to go over it with a variety of scrapers and lacquer thinner to get rid of any grunge in nooks and crannies that the sand blaster couldn't reach. When we brought it back from the sandblaster we put it on jackstands with the bottom of the frame on the top. I primered and painted everything I could reach and then got a couple of buddies and an engine hoist and we flipped it over. I then primered and painted the top of the frame.
By the way, I'm using brushes to paint with and my paint is XO Rust Red Metal Primer and XO Rust Satin Black, $6 a quart at my local True Value hardware. Less than a quart of primer and a quart of the black was enough for my frame.
