On Mon, 8 Mar 1999 13:15:47 -0800 (PST) Ulix Goettsch
<ulix@u.washington.edu> writes:
>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
After you apply the primer, the moisture starts to work right then to get
through the primer. Under some conditions you can keep that pretty well
under control. Like spraying under really low humidity.
Paul
PAsgeirsson
>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 __/__,__
>___/__|\__
>..............................................(_o____o_)....<_O_____O_/...
> '67 Sprite '74 X1/9
>
>
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