Vinyl siding and trim paint question.

I have vinyl siding and have spent the last three days painting the wooden window framing (that had horribly peeling paint and even a little wood rot). Now, in an incredibly foresightful manner, I’m wondering about the aluminum trim. It looks terrible compared to the freshly painted wood and the caulk is discolored and dingy. The whole house needs to be power washed, and that may help, but can I paint on metal (now that I’m done)? Will it bubble up or flake?