I got a Grizz off of ebay recently.
It was drilled once and the drilling was very close to my own so after it was plugged and redrilled it looks perfect.
I did not try to refinish it, I just tried it as is on a heavy house shot.
Would not grip! Sliding the whole way.
So I took it down to 180 grit abralon hand wet swirl sand.
Tried it again and OMG...too, too, too strong and early! Lol.
Couldn't even get it up the lane. Ha, ha.
So I contacted Brunswick and they said stock finish is 320 wet sand.
So I had the pro shop hit it on 4 sides with 320 wet sand.
Will try it again and post back to see how it does.
It's an experiment in progress...