Anodizing increases aluminum hardness by 7x. But, if you have polished rims, i'd be a little wary of using a brass brush on them - wouldn't it be possible that you could take off some aluminum with the wheel ?? I don't have a hardness table handy ...
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I think that the 1960-1980 bicycle era is so interesting because the technology hardly changed. At the start of the era you could have a campy 12 or 15 speed and at the end you had a campy 12 or 18 speed or maybe even a 14-speed. That's not much change for 20 years' time.
when the technology was hardly changing, the manufacturers have to do a lot more to attract attention to their products, so styling was more important, as were frame embellishments (many different manufacturer - specific embellishments existed, including proprietary lugs, cable stops, maker-branded parts, proprietary seat clamps, etc.)
Today a grouppo has about as much shelf life as a tomato.
- Don "trying to stay below 1/day limit" Gillies San Diego, CA