When I did mine I stripped the frame, pressure washed then sandblasted. I got as much sand out of the inside of the frame as I could using a long air hose. I then use the internal frame spray from Eastwood and let dry, Then used the Chassis Saver from Magnet Paints on the exterior, followed by Eastwood Extreme Chassis Black as the UV blocker. I am very happy with how it turned out. I did not have to use the rust converter after blasting so I can not comment on that.
1987 YJ, 258, Weber 32/36, HEI, Custom Sound bar, Hardtop/Sun-rider/bikini tops, 2" Lift, 1/2" Boomerangs, 1" Body & MM Lift. 32x11.5x15 Copper STT's on Black Rock 950 Lobos w/4" backspacing, Still need Front Bumper and Seats.
My build thread: [url]http://www.jeepforum.com/forum/f12/my-very-slow-87-yj-build-thread-1137667/[/url]