I have this SBH for years and it came with a set of AJAX plastic grips. I just finished working a stock for a co worker and used some Brownells textured spray.
I sanded using my detail sander with 100 then 400 grit. Cleaned with acetone then sprayed the grips using black (comes in other colors). I then stippled the front and rear like a 1911.
Interesting to say the least they are now not slick and have a texture not as coarse as skateboard tape.