Paul,
does the primer have to seal out moisture if there is a coat of paint over
it? I had hoped the the ppaint would keep the moisture out.
Ulix
On Mon, 8 Mar 1999, Paul A Asgeirsson wrote:
> On Mon, 8 Mar 1999 10:33:12 -0800 (PST) Michael Dietsche
> <mdietsche@yahoo.com> writes:
> >
> >I recently had an interesting experience baking enamel on parts. I
> >put some small parts that had been primed and painted with spray
> >enamel into a 200 deg oven. It looked good but the paint later came
> >off in sheets. The metal was shiny -- the bond was lost between the
> >primer and the part. Other baked parts were okay where I'd used
> >engine primer and engine paint. It leads me to beleive some primers
> >aren't suitable for the bake treatment. Back in the days when I was
> >on the factory floor we baked beautiful enamel on our equipment in a
> >huge oven, but I don't know what kind of enamel was used or whether we
> >even primed the parts. Anyone know enough about paint to enlighten us
> >on this?
> >
> >---Lancer7676@aol.com wrote:
> >>
> >> Allen--
> >>
> >> A while back there was a thread about baking enamel. I think wheels
> >would be
> >> perfect for baking. I plan to bake mine when I enamel paint them.
> >Gives a
> >> good hard dry finish.
> >>
> >> ---David
> >>
> >
> >==
> >
> >Michael B. Dietsche, P.E.
>
>
> Primer is not primer, Sort of like the Ogden Nash book, "Pigs is Pigs!"
>
> A good bare metal primer is a metal etcher and a moisture sealer. Most
> rattle can primers don't quite do that. It's usually one or the other.
> Without the etching properties of it, there won't be any adhesive
> properties to it on bare metal. Without the moisture barrier, it won't
> keep the rust from creaping through it. I'm sure that we have all had
> some interesting experiences with each of these cases on otherwise great
> looking and careful work we have done to the pieces and wondered what we
> did wrong.
>
> Paul
> PAsgeirsson@juno.com
>
>
Ulix __/__,__ ___/__|\__
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'67 Sprite '74 X1/9
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