...Undercoating...:(

Did undercoating in Cda. many years ago.Varsol was the best liquid we found for removing undercoating.That and a little patience and elbow grease.Just bought a set of inner fr. fender inner shields for my Cuda.Undercoating was unusually thick.Used a hammer and small chisel to remove the really heavy coating to get to the bolts.A good undercoating job is usually only a few mils thick.Hope this helps.