I did Brightsides Kingston Grey on the nonskid 7 years ago with Awlgrip's coarse nonskid additive. Lighter grey on the gloss. I like the nonskid. VERY grippy without pain.
The Kingston Grey? Liked the hide the dirt effect but...
HOT, VERY HOT!
Also, Brightsides doesn't have the durability. Planning on System 3 WR LPU this time. Still 2 tone but almost white for both nonskid and gloss.