It works for light rust but if you're planning on doing the whole frame, consider sand blasting. Either way, get some paint on right away or it will rust pretty quickly.
2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights