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1. Test your
chosen paints on some portion of the case that is easily stripped
and repainted before painting the whole case. I didn't and had
numerous problems changing my color choice from red to blue.
2. Stick to one
brand of spraypaint. Many times, if you spray a new brand
over top of the old, you will discover they are incompatible.
The paint does wonky things and makes a mess. This is hard to
recover from. See #1 about the importance of testing paint.
3. Measure and
check everything twice before cutting metal. Hold the fan
up where its going to go. Do it for each location on the case
individually. It had escaped my notice that the front fan location
was a different size than the rear. I ordered 3 identical fans
and one was wrong.
4. Research a
lot of articles on the web. Someone has done it before, and
they can help you to do it better. Also, look for articles to
corroborate each other. If you have only one guy's opinion, don't
place too much stock in it. It's free advice and you get what
you pay for.
5. Prep is the
most important part of the job. Mask thoroughly and carefully.
Assume overspray will go on everything that isn't explicitly protected
even if you didn't paint anywhere close to it. Clean thoroughly
before painting. Don't leave finger oil everywhere. Completely
disassemble the case, removing every possible part so you can
paint them individually.
6. Make sure
you are done cutting and grinding on the case before you paint
it. Vacuum the area and put down a fresh drop cloth (they're
cheap insurance). Wait a day for dust to settle. Industrial painting
is done in a cleanroom environment. See how close you can get
to that ideal.
7. Come up with
a cooling strategy. Think carefully about where to put fans,
not just from a cosmetic standpoint, but from the standpoint of
optimum cooling. See my notes on the Specs
Page about how to do this.

The first color I tried from the first paint
manufacturer...
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