I've used the Jamestown's Totalboat Topside Primer. Watch out when you sand it: if you sand it 'dry' you'll very quickly load up the paper. Use it 'wet' by splashing a little water - like a tablespoon - as you go.
As to the paint, I've never used Easy Poxy and couldn't advise you on how to apply it. I use Total Boat's paint or Epifanes, and use a 2" brush.