When I was digging out my old gloves to compare textures, I found a resin bag ($5). These work to improve the grip of your gloves or bare hands. So does weightlifting chalk ($15-20). I prefer chalk between the two. You can also use the chalk in the gym when you are gettin' swole'
It's sort of difficult to see here, but Hoy would sometimes use bare hands and chalk (I assume it was chalk) for time trials. You can see the white substance near the palms of his hands.