Sure you want to paint it?
Paint on aluminum looks nice at first, but scratches easy and is not very durable over time. Ends up looking crappy after a few years of wear and tear.
To repaint it is a lot of work and money to strip off the old paint, prep the surface and paint it again - just to do it again later down the road.
Marine grade aluminum left bare will get a thin layer of oxidation on it and then stays maintenance free for decades. You can also regularly polish the aluminum if you like the new shiny look. Wraps are also on option if they are not too hard to remove and re-apply when they wear out.
Just my thoughts from owning an aluminum boat for 20 years.