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The bonding agents are oxidizing and numerous heat cold cycles crack the primer. Some color paints hold up better than other, as do some primers but once your through to the primer, the primer usually fails quickly. Salt exasperates things if the primer gets cracked. Keith' > >Now that our cars are getting this old though... the original primers are > >failing. GOing down to metal was probably a good idea, especially if > it was > >a car that saw alot of sun. > > Why are they failing? Phillip is a sundappled Cali car, faded down to > the primer, still holding up in the rain. > > Peter Parker > '66 Square; Phillip > Portland, OR > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >