A friend did a pair years ago on my buffing wheel. You can make them look like chrome. First you need to remove the anodizing. Naval Jelly (rust remover) will do it, but you need to be careful, it will eat into the aluminum too if left too long. We used to put the part into a plastic food bag with a Zip Lock, add enough Naval Jelly to cover then massage it around every 10 minutes for a few hours.

Honestly, after my friend finished he said he'd never do that again. Took a couple days to clean and polish everything. I have a set of 151s in rough shape I'll probably go that route on.