After looking at one on gunbroker I don't think working them down would be all that good an idea. Meaning I don't think I would do it. There are all kinds of options to refinish but the thought come to me that the guns designers probably did that for a reason. Being the surface area is smaller than some other semi-autos to knock the serrations down a little might do more harm in the long run than good in the short haul. Especially under a high stress situation something like that might cause quaky sweaty hands to slip. and no good can come from that.
To me it looks to be a case of roughing up the hand rather than knocking some metal off. That's just me though. I can't recall anyone doing anything like that to a slide like the one on your weapon. But I'm not around a lot of CZs either.
Maybe some of the others here have had more experience with that particular model and might help you better. but if it was my pistol I don't think I'd want to do it. and I'm usually one of the first to want to do all kinds of things to a pistol. Being a 1911 fan and all it just comes natural
In this case I just don't know.