I’m building a 56 F-100 and have it tore down to the bare frame. I have hit the frame with a wire wheel on the outside, but the inside of the channel is hard to get to. Has anyone chemically removed the rust from their frame? What did you use? I’m redoing the entire truck but am trying to do it “lower budget” by doing all of the work myself. I don’t have the money to pay to have it blasted, but I have an entire laundry room full of new springs, shocks, brakes, steering components etc waiting to be put on. My plan is to paint the frame and parts with brush on tractor paint and then put it back together. Any suggestions on the rest of the rust removal? I’ve heard about using phosphoric acid. Can this be sprayed on with a squirt bottle? Is there a specific brand or name I should look for? More of the frame has been wire wheeled since the picture was taken but still roughly the same shape. You can’t tell really, but the entire thing has small surface pits. Thank you in advance for all help. Zak. Sent from my iPhone using H.A.M.B.