On Mon, 09 May 2005 20:15:51 GMT, "Edwin Pawlowski"
wrote:


"Gideon" wrote in message

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.




Gideon wrote in message ...
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.
..