No polish jobs? You're would leave it unpainted? In the last few weeks I've seen a couple of aluminium cats which had unpainted hulls, and they look really bad. (presently anchored not far from one) They turn a sort of blotchy dark grey, with streaks everywhere.
Practical maybe, but not very nice to look at.
Interestingly there's also what looks like a Wharram
design nearby, that appears to be built in steel
. (Judging by the rust streaks)