I thought in another thread there was some discussion about P-static and how different paints or surface treatments may contribute or eliminate P-static and it's effects.
Talking to a few -10 pilots it sounds like there are some instances where they have had radio issues due to possible p-static, while others have never had any issues. Due to the experimental nature and numerous differences in how we assemble these aircraft, you won't know if you will be impacted until you do some testing.
Personally I was initially thinking of putting in wick mounts (following mouser) however I decided that while that I really wasn't sure they were needed (or if I really wanted to fly a lot of hard IFR). I figured that if needed I could always add those to my system down the road if I found the need.
As to why some certified planes need static wicks, I would guess it's because their testing and analysis showed that with their design, paint, and avionics that there was a need for additional p-static mitigation and the use of static wicks was the best (or quickest) solution.
RV10 - #41778
Empennage - Done (for now)
Wings - in progress