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I did that once back in my chrome period, I say go for it!
Rather than chrome, or instead of, you might consider clear powder coat. Or Cerakote.
Yes, you can put a mirror finish on aluminium, with the application of wet n dry, elbow grease & polish.just dance humbertoBut it will need periodic renewal, which can be a pain. I've seen the results of a GRiSO's black rocker covers polished - looks good. The advantage of chrome is ease of maintenance - an occasional wipe & the odd polish. Aluminium can be chromed - had is done on the Enfield V-twin successfully - there the rocker covers are up under the rank & frame and not easily accessible. I have not had any experience with other coatings, although I'm about to try out a KBS clear coating on some rocker covers from a Nevada I had bead blasted.
I vote for polish and clear powder coat. Chrome has a tendency to peel off aluminum especially if the bike is stored in an unheated space below freezing. The expansion and contraction of the aluminum causes the chrome to crack.Pete