Quote:
Originally Posted by El Campo
Be extremely careful about blasting any flat parts of the cab. The metal is so thin on the back and the roof that it warps very easily. Just look at last 2 pages of my thread for proof  . That being said its almost the only thing that cleans up gutters and flanges as well as we like. I'm planning on blasting jams, flanges, firewall, etc
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X2 on this. Stay away from the big flat areas. You can use a DA sander with 80 grit to take it to bare metal. Then, if you have pitting you can hit only the areas needed. The heat from the media can stretch the metal causing warp. It's a pain to fix.