I recently sold an Inox (stainless) Beretta 92fs to my future brother in-law. I had the thing for two years without any problems. I barely even oiled the thing, and it would sit for long periods of time (I never shot it, that's why I sold it). When I sold it to him two months ago it was in perfect condition with less than 200 rounds on it. He called me this afternoon and informed me that it is rusting.[thinking] He braught it over to show me this evening, and I was astounded. This thing is covered with little pits of rust. As if that wasn't bad enough the front strap and trigger gueard are somehow stained black. What the heck happened to this thing. He's been using a Kleen Bore silicone impregnated cloth on it about every two weeks. He keeps it in a drawer with a Master trigger lock on it. The only other things kept in that drawer are a set of keys and some vitamin suppliments in plastic containers.
I can somewhat understand the rust, I know that stainless can rust, but he swears he did everything I showed him maint wise. What really confused me is the staining of the aluminium frame. It almost looks like the rubber Hogue like grip is breaking down and imbedding itself in the pours of the aluminium.
I need help in suggesting what to do with this thing. Neither of us feel comforatable enough in trying to fix this problem ourselves. I told him to call Robar and get a price on a cleaning and NP-3 finish, but I think that will be a little more than he is willing to spend on this gun. Any suggestions on the source of this problem and a solution would be very much appreciated. I know it is not my fault, but I can't help but feel bad about this. This was his first handgun and now I fear he will be discouraged by this. It's nice having a person to go shooting with on a regular basis.
Thanks in advance for your help.
Ed.