Engine Bay

See what the experienced paint guys say.
How well it will hold up depends on how well its prepped and the type of paint it was last sprayed with.

In the photo, the paint looks pretty good and matches the rest of the body.
I'd clean it and leave it unless there are problem spots.
Disadvantage of spray can enamels is difficult to control and minimizing 'orange peel' (ie bumpy textured finish).