Theo's results are not typical of most home applied powder coatings. We have
to admit that he is skilled at most things he does. The general info is
good. Powder coating casn be applied at temps higher than 400 degrees, some
higher
than 800 degrees. The limit for home has to do with the easy bake ovens max
temp and the market these products are being sold. The key to the results is
the prep of the surface. The first thing that should be done is to "burn off"
any oils and contamination It
then must be blasted to create a surface that will hold the product, this
requires a somewhat agressive approach such as 120 mesh cracked steel shot at
ptessures that do not overheat or stretch the metal. Next blast with an alu.
oxide to even the surface texture. At no time should the parts be handled by
bare skin or any glove that has silicon or talc. An appropriate electrical
contact must be made and the part should be hung before powder application.
Application needs to be done in an manner that the powder is applied evenly (it
can be
somewhat forgiving on this point). The part is then heat to around 425
degrees for approx. 40 to 60 minutes depending on how well the oven retains
heat and
how even the temp is in the oven. Removed and cooled. I would never recommend
saving powder recovered from the application booth, can cause finish problems
and damage the gun. Finally, wear a good small micron mask!
Also, powder coating is not for headers and will come off at the temps it was
applied.
Good article Theo
Moonstone
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