Thanks, Rick...
The quick answer is "4 inch foam roller"
The process was - orbital sand with 60 grit; wipe with mineral spirits; orbital sand with 220; wipe with mineral spirits; fill with Evercoat Formula 27; sand; mineral spirits; roll on Pettit Easypoxy paint with 4" foam roller.
I redid the water line. After some major sanding, I uncovered the original(?) water line which ran much truer to the actual... waterline. Placing this one via photos of the boat sitting in the water was interesting, we'll see how I did in a few days.
I also misquoted the publication I found the article in above - it was On the Water, not Saltwater Sportsman.
-Paul