Unless you are doing a body off, I'm inclined to think it is better left on there. It seemed I spent forever on my cab bottom and frame after I separated them. Can't imagine being on my back under there scraping. Anyway, my truck had caked on mud from 50 years on the farm. Under the caked mud was the dealer installed tar undercoat in pristine shape. Under the dealer installed undercoat was the prettiest gloss black sheet metal, yes gloss black. That being said, nothing better than that to protect the underneath IMHO. You break into that and you daily drive it, especially in the midwest, you might/will start to rust.
Last edited by sstock; 01/13/2018 3:38 PM.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration