The marine clean is a degreaser.
Really for best result's with the POR paint is to use the 3 recomended product's togethor. 1- marine clean HOT,HOT water 2- metal ready 3- POR 15.
And the paint needs to be topcoated to last. Even if it is NOT in direct UV.
They also have a top coat.
I use Enamel paint over it never had a problem.
I am getting closer to painting a frame and part's right now on my current project. I am thinking about trying Eastwood's Chassis paint.