John, I would definitely paint them. I swear by that POR stuff, in case you haven't noticed. :) Not only can it be painted on top of rust (in fact, it's preferable to paint it over rust because of the grip), thereby saving a lot of labor (yes, the loose rust must be brushed off and the parts must first be rinsed with water and let be dried), but POR-15 also dries to a very hard surface that does not easily get chipped or scratched. There is a caveat, however: I'm not sure what nasty chemicals go into that paint. Michael Heron told me he thinks it contains cyanide derivatives, although I didn't see any warnings on the can. (Not that it would need FDA approval...) I'm not sure which color would be best. I used black because that's what I had in stock and have been using for chassis parts, but grey may keep the boxes warmer, I don't know. (perhaps someone who understands the physics involved can explain to me why color matters for heat conductivity--is that the word?--, even in dark places.) Sami
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