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Posted by JimL on June 13, 2005, 8:28 am
wrote:
>
>>
>> I didn't consider 2 part epoxy auto finishes. This are probably
>> more durable, but they still could have problems. It is difficult
>> to obtain any finish which expands and contracts at the same
>> rate as the underlying steel. This creates shear forces which
>> will undermine the adhesion between the paint and the metal
>> surface.
>
>It seems to work on steel automobiles.
>
>
>>
>>
>> I'm just guessing here, but I'll bet that the auto paint will cook also.
>> I think that the temperatures on a dark door covered by a storm
>> door are much greater than those on an auto finish. Imagine the
>> difference for your auto finish if your car were wrapped in a non-
>> vented glass envelop a few inches from its surface every day while
>> baking in the sun. Combine that with the fact that there would be
>> a very big difference between the excellent factory finish on a car
>> and an aftermarket car paint finish applied to the house door.
>
>Your dashboard can easily hit 150+ and things inside are painted.
>
>>
>> If the auto paint provided much
>> relieve, then I'd assume that the steel door manufacturers would
>> spend the extra few dollars to use auto paint at the factory. I
>> would also guess that the door manufacturers are already investing
>> a lot of money in paint research.
>
>Perhaps, but what colors? Homeowners generally buy a door for style and if
>steel it is primed from the factory. How many colors should they offer and
>how many will your local distribution system stock? Opens a big world of
>inventory and expenses. It would be nice if they at least offered white and
>they you could trim in a different color if you'd like.
>
>I do know of a couple of doors that have been painted by a body shop. They
>are still in perfect condition after 15 years, but they do not get much
>direct sun so it is not a fully fair comparison.
>
I would think that a bit of automotive engine paint would last like
forever on a door, especially if you prime it first.
.
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