I have only played 4 rounds so far this year with my 639 black combos with moderate range time and so far so good. But I mean that's not a whole lot of use so I can do my best to keep you updated as the season goes on. I do my best to keep them clean after each shot with just a wet towel that way I'm not using something to abrasive to clean and effect the finish. Such great irons though, I have been nothing but happy since I put them in the bag. I kinda figured after a little use the look might be pretty cool having some of the finish worn off (as long as my wear marks are in the center of the club face lol)