I have close to 200 hours on a 3 blade. It has one ding from a spinner screw that broke out and hit the prop blade on it's way to Parts Valhalla.
I slow down in rain, but sometimes not enough because I'm getting slight erosion of the paint, mostly on one blade. Go figure.
Also, sometimes when climbing thru 6000 ft (initial climb after take-off) the prop seems to go out of balance, like one blade changed shape. maybe it's a pressure or temperature thing? After a while it slowly joins the others and gets smoother.
I like this prop and would send it to CATTO for refinishing sometime down the road.