Right now I use a Bravo Concealment DOS. I love it. I have maybe 2k draws from it and no signs of wear(training). I also have their RTT Holster(I think it is from a YouTube channel?) and I use it a lot as well, for field fire and such. So far very happy. I don't think they treat the inside. But i haven't seen any wear yet.
I also won't mind it though, when wear does show. My carry has more than 1 scratch. I train with it and am not as occupied with its looks as much as its dependability. Actually last class I took, an instructor complemented the scratches lol.