The needle scaler left very small pieces of rubber so I then used a braided wire cup wheel to clean up the surface of the frame rails and rear floor pan. First some "before" pics:




And after.....


1970 Barracuda B5 6.1 Hemi/6 speed
1969 Charger survivor in R6 383/727-wrecked 12/24/18
1968 Charger in original burgundy paint "Ribeye"
1968 Charger w/ 6.1L, TR-6060, 9"
1968 Roadrunner w/ 6.1L/6 speed
2011 Dodge Ram w/ 6.7L