Brad Wilson
New
During my annual servicing of my Classic second stage reg. I noticed the inside of my Adjustment tube looked to have a "rust" color patchy down the inside of the tube after I did the ultrasonic cleaning. I think its just copper but not sure. I've got 200+ dives on the reg. I wouldn't think the chrome and nickel would have rubbed off that quick but I have been wrong before, my wife tells me. Any insight or experince knowledge would help. This is my second service since the repair class and still green at this. Thanks