Hey Bill,

It is a crushed glass media with high pressure water... I would not have believe it if I didn't see it with my own eyes. He did a test for me on another fender I had since the undercoating is the same stuff.. Well, it went right through the undercoating without any problems then he told me to put my hand on the bare metal, it was cold.. Soooo, no worries on heat warping. This sure beats the heat gun and a putty knife in a hot garage over multiple days... Hopefully will get it to him on the 21st... Going straight to the body shop when they will shot the car with epoxy before dissection...

Oh, thanks for the tip on the holes for the framerails... Yes, I guess it would be a PITA to get all that stuff out of it...