Spatial, you wrote, "As for static, I did a tough test. I played the treated record without the static draining tonearm brush and at the end of playing, there was no static. Zero, non-whatsoever."
I have a few questions, but please know that I do not mean to be contentious. I pretend that we are all sitting in the same room and are friends having a conversation. No animus here.
First, how do you test for or measure static charge? Second, did you also do the experiment with an untreated LP and no "static draining" brush in the same room on the same TT? If so, what did you observe? I have no basis to doubt that Gruv Glide might protect from static charge build up due to the many other causes, but I do very much doubt that static charge build up happens due to stylus/vinyl friction.
I recently got out my ES meter to observe what happens as I play an LP. I focused the meter on an LP as the stylus traversed the surface from outer edge to label. The meter has to be held within one inch of a surface to be read, so doing it with a rotating LP was a bit tricky. Anyway, first I induced a charge on the LP by yanking it from its sleeve, which by the way was not paper but that translucent bag used by Polydor and some others. My meter read -18,000V (!!!). Then I discharged the LP with my Zerostat, which got it down to around -100V, just as it usually does. Then I played that LP and used the meter to follow in the tracks of the stylus. The reading bounces around quite a bit but never exceeds a value between say -100V and -200V. When I focused the meter ahead of the stylus, i.e., grooves that had not yet been reached by the stylus, the readings were wildly variable but always below -100V and I also saw that the sign of the reading (plus or minus) was bouncing around. (Since we all agree that vinyl attracts negative ions and so develops a negative charge, a positive voltage reading is not important.) So I thought maybe something is happening here, because of the slight differences in the readings after the stylus has passed by vs before the stylus has reached a groove. When the stylus reached the innermost grooves, I lifted it off the LP and read the LP surface. Zilch. Nothing above background. In fact, if anything, the readings were lower (less negative) than -100V. So IF there is something happening locally as the stylus passes over grooves, it never accumulates and is very quickly dissipated and certainly never reaches levels of charge remotely in the same range as it does with removing it from its sleeve. I need to repeat this experiment with different LPs because maybe the vinyl formulation makes a difference. I have one LP that failed to charge up when I yanked it from its paper sleeve, even after 3 tries.

