I call this next shot "why I will never POR15 new metal again"...
It literally just peeled off the bottom of the floorboards, iphone included in the sweeping up for scale:
Interestingly enough, any of the "old metal" (spine, torsion bar housings, etc.) which was prepped the same way is fine...can't take the POR15 off with a chisel. So, I let the bare pans 'season' for a day or two and then repainted them. We'll see how this holds up...
-Dave