My kid nearly scraped the driver's side mirror off as she backed into a light pole. I bought one on eBay that is the right model but wrong color.

So, whadda I do? Lightly sand the whole thing then primer it? Then sand the primer (after it's dried) with a fine grit, like a 220?

Then paint flat black for several coats (I don't know how to match the color of oxidized, faded black so I'm thinking, WTF, it's the kid's bumper car until she quits hitting things).

Oh '88 300E. Burgundy with (apparently) black mirrors.