Well I hope the price is right on the boat.... as it is ALOT harder to paint than you think. See the manufacturers put a clear poly like membrane over the alum so it does not oxidize, well that membrane prevents a good paint bond, and thus the paint flakes, chips easier.
On the 1980 new baot at the ttime--I used 3 gal od "dualsol" ( like xyxol, but more potent) to remove the plastic film--took ALL day. And then I sprayed alum oxide for a alum primer, and then 2 coats of oil base paint over it. Talk about work and expense! Never again.
It is my opinion that buying a boat factory painted is the way to go as they have a very good bond to the paint and hardly any extra expense for the camo paint job. Nope, converting a fishing boat into a duck rig is way too much work IMHo if you want a good lasting paint job.