I have been making and using PR handles and brushes for years. I micromesh all the way with no top coating and there is no slipping issue with plain water. The shaving soap now is a different story. It's quite slippery and even a deep knurl doesn't help much. Luckily, that's not much of an issue on the razor handle.
Mmmm ... been using mine for over a year. As I think back ... I never get any shaving lather on the handle, during use, or if any did I'ld immediately rinse it off next time I needed to clear the razor head.
My beard likes to grow rather thick, so I use a straight razor first, to get it down closer to my skin ... then I come back and get the thick areas that I missed with the safety razor, and finally when it's mostly gone, I grab the Mach 3 and get the rest. I apply lather 3 times, total, and usually shave about once a month.
I have a razor with CA and a brush with eight coats of BLO/CA. I like the LOOK of the CA, but prefer the FEEL and grip of the BLO/CA. Both have been in use for years and look like new. People seem to buy more wood razor and shave sets with bocote outselling all others. I use BLO/CA and a couple if coats of TruOil on shave stuff I sell. Looks good and is grippable. Your mileage may vary. The person who posts about shave brushes is the man at making shave eye candy. His stuff is very glossy.
I have been fortunate to sell 12 3-5 piece shave sets in less than a year. At $125+ they are great for business.