Dirty D - 73 Duster Street/Strip Build
Its amazing what 20/30 years of leaking transmission fluid being flung around the underside of a car by the driveshaft will do to the undercoating....it practically dissolves it. You could literally scrape the coating off with your fingernail. In addition to breaking down the undercoating, it also provided great rust protection. Underneath that softened undercoating was practically rust free steel.
A couple hours with a 4" wire brush on the end of a grinder and the underside of the car was ready for epoxy.
While I was there I also fabricated and installed some subframe connectors using tips from the forum.
The makings of the subframe connectors:
Epoxy coated:
Subframe connectors and epoxy coated floor: