I knew one older officer that used a nickel plated combat commander more for a club than a firearm. Maybe because his shooting sucked.
Ive seen Smith revolvers used for clubs that were left inoperable with everything from barrels bent at the frame, cylinder cranes warped beyond repair, and trigger guard crushed to the point of actually pulling the trigger causing a discharge.
Criminals are ruthlessly stupid.
If I had ever had an officer use a loaded pistol for a club, I would have sent him to the house, and fought for his firing.
If the fight was that desperate, just shoot the suspect. It would be safer for everyone in the general area, and easier to explain.
Such things were, and are done, out of ignorance.
So, I guess I can't answer your question to the polymer question.