Mark - I painted my cockpit
with a single
part "poly" - International, Toplac.
The horizontal surfaces are downright dangerous. Almost all of my crew have fallen.
I am planning to do one more top coat with a mix of silica (sand) which is the norm for this.
I am told that if you can find very fine pure sand you can use that but International sells quantities of special purpose stuff. I am begging a bagfull from my sailing club boatyard.
If you don't add some sort of antislip I fear you will be tempted to tray some of that crap black antiskid tape which doesn't last.
The good news is that even without primer this stuff went on very smooth with 1 1/2 diameter by 4 inch rollers. No orange peel, super nice surface and adherence has been great. In our high temps I had to thin the paint
somewhat to get it to flow.