Those grips I pictured above... I will let out my secret on those, since I never sold a single one.
What that is, is .....
I'd buy the brightly colored printer or copier paper at Office Depot or Office Max. Then with one of those guillotine style paper cutters I would cut strips about 3/4" to an 1" wide. Then I would drop them into the paper shredder. Then I would take a half gallon milk jug, cut off a corner, pour in some two part epoxy from Lowe's, then grab a handful of the colorful shredded paper, with a stick, mix it all together, throw in some more shredded paper, stir it together. Then I would line a channel iron mould with wax paper or cellophane, scoop the gooey mess of shredded paper into the mould, then lay some more wax paper or cellophane over it, then use another piece of steel, I would squish down with some C clamps. Let it sit over night, to harden up.
Then came the bandsawing, the drilling, the tablesaw jig, and the disc sanding.
The stuff was surprisingly strong.
Anyway, I've got some burls, tiger maple, birdseye maple, spalted tamarind that I will get to whittling on one of these days.
I think what hurt me was not having a CNC router, which is about the only way I can how VZ does his grips. He probably buys the fiberglass micarta (G10) in 4X8 sheets, sets it on the table, hits a few buttons, and VOILA! 100 sets of VZ grips with all the grippey texture milled in them pop out like 2 hours later. The other advantage is with a CNC router a vacuum hose be right there at the spinning bit to suck up those little fiberglass fibers.