rust on body found - Advise on removal
Just found first rust bubbles on the body. Located on the left rear corner panel riveted seem, rust is visible around one rivet and in one spot lower down on body. Upper rust is 1/4 inch round, and the lower rust spot is about 1 inch long by 1/2 inch wide. Rust is under the paint and I do not know the source. There is rust inside the tub on the mounting plate where the roll bar is fixed to the inside tub area. It is in line with the rivet rust. Looking inside the wheel well I can see nothing on the reverse side of the panel and I can get "behind' the lower rust spot. Any advice on managing these.
Photo is coming soonest - my posting skills suck as I keep getting rejected.