Years ago I read an article in one of the US hot rod mags about home anodizing. The kit needed is all readily available and surprizingly easy. To get a chrome finish you have an alfoil anode.
You would need a fair size tub to put a grille in but it would work. The other surprize to the whole thing was that you could do it with a car battery for the power source.
I have searched high and low for the article and the magazine since but cant find it or any reference to it. Maybe someone can help with the article.