RE: Nonskid Repair on wood deck
While the foam dust that Roger suggests is used by many, I have used granulated salt with great results. The salt ultimately dissolves away, but it leaves a rough non-skid impression in the epoxy. Granulated sugar can also be used, but it can attract ants until it dissolves away. The great thing about salt or sugar is that they completely disappear and leave nothing to yellow over time. Foam usually has some color to it, and any trapped residual will very likely yellow over time after extended sun exposure.