Thanks for all this advice.
Tim, Do you recall if you used a tight nap roller? Seems that would be the choice. And, yes, your recollection of the Mar-K system is correct except Mar-K applied 3 coats of POR15. I still have to cut(round) by sanding the board edges and the weather may not cooperate for POR15 application, but I'll post how I made out when done.
Tight nap rollers.
POR-15 Black Rust Preventative Paint and BEHR Gloss Black exterior paint
"POR-15 Rust Preventative Paint dries to a very hard waterproof finish but it is UV sensitive. We applied three coats of black POR-15 Rust Preventative Paint paint to the boards and topcoated with the same BEHR gloss black [three coats] paint that was used in the first test series. The POR-15 Rust Preventative Paint will provide the strength and adhesion and the BEHR gloss black will provide the resistance to sunlight."
