What is the best way to prep new body panels?

[D-n-Tyke]

Just like the title says, what is the best way to prep newly purchased body panels?What do you guys do to them, if anything, before installing them or finishing them? In my case I have a new core support, inner fender and front fender that I just bought. They all come with the black EDP finish on them. Is that good enough to just install as-is for the core support and inner fender? Or should I finish them with something, maybe a coat of POR-15? What about the fender, is it okay to just paint over the EDP or do I have to put a coat of primer on first? And if so, should I strip off the EDP before applying the primer? Can the finish color coat go straight over the EDP? As you can tell I am pretty new to this and any help/advise would be greatly appreciated.

Panels were purchased from Classic Industries if that matters.