spray paint

I have light mounts with aluminum bases that are close to the water and figure its probably a good idea to coat them with some sort of plastic or paint are there any recommendations ive seen things about krylon fusion is this a good option or should i use something else just want to be safe...

Hi everyone! I'm wanting to maybe get a little fancy with some sump pipes and paint them to match everything. Can the outside of the pvc be painted with Rustoleum Spray paint? The pvc will not be in the water, just from my tank to my sump bulkheads. Bad idea? Been done before with success? I...