2000 which is an epoxy
barrier coat has stuck very well to my aluminum hull now for 15 years. There has never been a problem.
well to aluminum.
Aluminum either needs to be completely open to oxygen so the oxide can form or it needs to be completely sealed from oxygen with good coatings. The in between is when you get the problems.
I would be hesitant to buy an aluminum hull with a fiberglass/polyester layer because of the chance of delamination
and then water
getting inbetween the aluminum and fiberglass.
It is probably best to get advice
from people who have had an aluminum boat
for a long time. I have learned over time how to completely stop the corrosion