Just polish the aluminum with some wax. The wax will prevent air from oxidizing the aluminum won't it?

It took a long while before my cleaned aluminum boat faded or turned dull.

Maybe it depends on what type of aluminum it's made out of. There are lots of different aluminum alloys. My boat is a fishermarine with the thinner aluminum that was made way back in 1978. So that alloy may be much different that the newer boats aluminum. But then again it could be the same. LOL

What's that shark stuff made from? I ain't going to buy something that costs very much.

Regards,

Moose1am