[quote=arch]g,
before you start removing what looks like paint from your crossbeams, you may want to determine if it's an anodized finish. sanding off anodizing removes the protective layer that is on aluminum to prevent oxidation. silver aluminum is quite often 'clear anodized' and looks like raw metal, but it's not.
[url]http://en.wikipedia.org/wiki/Anodizing[/url]
[url]http://www.youtube.com/watch?v=UIeE2i1pTn0&feature=related[/url]
j[/quote]
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