Jim, Tenifer and other similar metal treatments are chemical processes that case harden the metal, it could be a finish by definition, but Glock applies the metal treatment to case harden, and then really finishes their pistols with the phosphate parkerizing finish. After I learned of the distinction between the metal treatment and the finish, I was only concerned with the park finish being applied improperly.jimjc wrote:The Gen 4`s do not have the Tennifer finish, Glock has changed the finish to another which the name escapes me at the moment. The new finish is said to be a bit blotchy by some, I have Gen 4 17 and mine is even so I don`t have what some are experiencing. The new finish is said to be as good as the old, it`s just a different process that's more environmentally friendly.
Also, Tenifer treatment is a liquid nitrocarburizing process that is branded under several names including Tenifer, Melonite, Tufftride, and there are also almost identical processes that are done under even more names. You may have seen one of these names and thought the metal treatment was different, or you may be correct and they may use a totally different process, but I'd have to be convinced of this. I have seen that whole thing on the internet regarding Tenifer violating EPA regulations, but I have not seen any sources directly from the EPA regarding it, so unless we hear that from the EPA or Glock, there is really no way of knowing (again, I could be convinced). Furthur adding to the confusion is that the SA XD has the Melonite coating, which is exactly the same as Tenifer, and if I understand things correctly SA does produce their XD slides here in the USA (frames in Brazil). I digress

Haka, I can relate with your friend... I also tend to analyze every detail. I have basically come to accept the imperfect finish at this point.