Anodising is done to help harden the outer surface of the alloy, and to help prevent damaging corrosion. Even ‘raw’ looking components are usually anodised. On something as thin-walled as a rim, I’d be extremely wary about removing an anodised surface. And this is from someone who’d sand the lacquer off some carbon handlebars. 😯
Anodising can be removed from components, using a solution of Sodium Hydroxide (caustic soda). Nasty stuff, so you’ll need to protect your skin and especially your eyes. You will then need to neutralise the alkali with acid (even vinegar is good for this). The raw alloy will then need polishing up to provide a smooth surface (corrosion and oxidisation is slower on a smooth surface), which will need to be kept clean and polished, as there’s now no anodising to protect it. I’d say it’s ok on thick-walled/dense components like cranks, CNCed stuff, but on a rim?
Buy a silver one and save yourself the heartache.