Painted Aluminum

[primrrd]

implements like trailers are typically pianted with an uncatalyzed enamel paint. you may be able to shine it up a bit, but net is a lot of work for
a littel improvement.
The best way to make it shine is to scuff it down and repaint it with
some better automotive acryl enamel, or urethane that you can catalyze that will hold up to the elements better.
In your case, if the paint is in good shape, you could scuff it up and clear it?