Originally Posted by rover4x4
Has anyone here used this product? I am trying to clean up my rear cross member and a few other areas this product seems to be easy to use and effective. it is a phosphoric acid based primer/rust arrestor.
Yup. i am using a product like that now. I used a wire brush, power washed the underside, scrubbed with hot soap and water, then simple green, applied phosphoric acid based primer, then 3 coats of rust inhibitor frame paint, then waxoyl.
I also removed the cross-member under the transmission and the fuel tank plate. I caught it time, i.e. only surface rust, no pitting. Ground areas down to white metal and did the same mentioned above. It's a long process and a dirty job...but it will added years to the backbone of the truck...