Bill,
Can you have the "other" side of the holes blasted too. In other words, the inside of the cab. Lots of little holes would be a candidate for
fiberglass, and I mean cloth, resin and
catalyst, on the back side and body filler on the outside. I think this could be a permanent repair if ALL of the rust around each hole were blasted to very white metal. My only concern is that the metal must be very thin in these areas. Isolated rust holes seem strange..was something behind them that trapped water/moisture.
This method sounds second class, but I think it would be effective, permanent and invisible if done properly. The absolute key would be to get rid of any signs of rust...then seal it from the atmosphere. Unless you have another cab available you are going to have to think positively.
Stuart.
