Non skid
On my Hunter 37C I repainted the non skid with Interlux one part poly, flattening agent and added non skid powder from Interlux. I experimented with primed and non-primed areas. I found no difference in coverage or durability. The non skid that I repainted looked like yours. I cleaned it first to be sure there was no wax or residue, taped it off with Fine Line tape, mixed paint, flattening agent and non skid and rolled with a 4" foam roller. Keep the paint agitated as the non skid wants to settle out. I also experimented with how much non skid to add to each mix. The more flattening agent added the thinner the paint goes on, experiment.
Alan Johnson C400