Degreaser and pressure washer then wire wheel is what I used then sprayed with 3m bed liner great stuff
I degreased with Greased Lighting and a garden hose then used a sand blaster then 2 coats Rust Bullet and then Dupli-Color bed liner.
spent countless hours removing the fender and underside junk, wouldnt be so bad had the previous body owner didn't fill every crevice with bondo as a rust preventive :16suspect media blasting = useless (unless its thin coating) wire wheel = works best but least fun gasoline = pretty good at cutting (bring plenty of rags) torch method (mentioned) = sounds best Just don't first use the gasoline and then decide to use the torch!!!!!!!!!!!
Hammer and chisel works well lmao That's what I used after the previous owner of the comet decided to slather bondo and some kinda concrete mixture all inside the damn trunk
might want to use a heat gun for the softening instead of torch lot safer,after you get the big stuff use acetone for the rest, can be bought at any hardware store in paint dept.
I read in a thread on here to use a halogen light on the back side of the panel to soften it then scrape it. Haven't tried it yet but sounded reasonable.