Restoring Aluminum Cranks Is it all right to strip and then anodize (at a shop, I suppose?) aluminum cranks?

I'm trying to build a bike and I saw second-hand cranks on eBay. They look like they're fine except for the scratches/abrasions they have. They're fairly cheap too compared to new old stocks so I'm wondering if it would be a good buy if I can restore them to look brand new again.

So would stripping, sanding, anodizing, etc. the cranks have any negative effect on them?
Well, from the comments, I guess it is all right to strip the cranks and re-anodize them. There wouldn't be any serious effects on the material itself. The only downside is the process and the cost, which would probably cost close to, if not more, buying a new set of cranks.