Dino,
There are other posts with wiser counsel than me and I will defer to them as to maintenance with aluminum grips
I have aluminum grips on my Stealth and I have no problems with them but I have very few rounds fired; something all the more difficult with present ammo shortage.
The long term question, as I perceive it, is will Rohrbaugh continue offering aluminum grips? For myself, aluminum is "okay", G10 is a material I hate and Micarta is something that I would love as an option.
From what the factory told me, Micarta was considered but nixed. I can only speculate that cost was a factor as Micarta is one of my favorite materials and can be made from different catalyst materials and different colors.