On Wed, 5 Apr 2000, JDL wrote: > Wouldn't something like that end up having the same problem as epoxy, > in the long run? Probably not. The epoxy is a fairly rigid, brittle material which breaks when the frame flexes. Either the engineers thought it wasn't as rigid as it was or they thought the frame wouldn't flex as much as it does. In contrast, most undercoating style materials are quite soft and really won't break. (I don't know why they didn't use a standard rustproofing material in the first place).