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Originally Posted by Aignam
This is slightly tangential, but....
I heard a story that one team used lexan on their robot, and spray-painted it. And the paint and varieties of temperatures caused it to become very brittle and it cracked during their first match. Is there any truth in this at all?
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I'm not sure about "more brittle", but I'm pretty sure spray paint contains a solvent that will damage polycarbonates. I believe ketones (acetone) are the main problem (I know these are damaging to acrylics like Plexiglass). In general, polycarbonates are much more resistent to solvents then acrylics.
In general, keep organic solvents away from polymers
(I believe there is a thread about this in the Control System forum).
There are spray paints specifically made for polycarbonates. Latex based paints would work (if they stick, I'm not sure).
Greg