"Tenifer is applied in a 500 degree C (932 degree F) nitrate bath to give the coated parts a skin hardness of 69 Rockwell Cone (RC). This is extremely hard, by comparison, a metal file's hardness is only 62 to 65 RC, and the hardness of an industrial diamond is 70 RC.What is wearing off is not the Tenifer (unless you have taken a diamond cutter to your Glock!) but the black phosphate finish on top of it. Glock can refinish your gun for $45.00.Glock's Tenifer coating penetrates the metal so that coated parts have a hardness of 55 to 60 RC at a depth of .02mm (.05 inch) below the surface. From 20 to 30 percent deeper, the hardness is still 48 to 50 RC. Metal this hard is incredibly durable."
Glock can be reached at (404) 432-1202.