i Took 7 different strikers of different wood types yesterday and 4 pot types, Slate, Glass, Copper and Aluminum and ran a very unscientific experiment with tip conditioning. I used green scotchbrite, 150 grit sandpaper, 200 grit sandpaper, 220 grit sandpaper and 400 grit sandpaper.
By far, and it was without exception, the 220 conditioned strikers played more consistently than when conditioned with any of the other mediums. FWIW
Mike