A year ago we wrote about our experiences with KiwiGrip non-skid paint and how we were pretty unhappy with it because the sharp ridges trap dirt very tenaciously, making the paint appear  permanently dirty, even after cleaning.
For our next non-skid experiment, we had a few ideas of other kinds to try. Finally a year later, we took advantage of some sunny days in March and tried out Interlux Brightside + Interlux non-skid additive (called Intergrip).

Happily, this non-skid looks much better than KiwiGrip and isn’t really even harder to apply. It seems we’ve found the right non-skid for our personal preferences. Of course, we still need to wait a few years to see if it’ll hold up to the test of time / use. But all the reviews indicate it will (we steered clear of Interlux Interdeck, a premixed kind of non-skid, due to reviews saying it doesn’t hold up as long).
Note: Intergrip should not be confused with Interdeck. Intergrip is their silica additive you mix with paint, and Interdeck is the 1-part non-skid paint. If you’re buying it in person though you’ll know you have Intergrip by its weight in your hand – it weighs hardly anything compared to paint (which is heavy).