[30 Closed Cab PU]

The only best way is in post 5, has been discussed in length on FB, and Brent does gas tanks the restoration way. Remove tank and split it apart at the welds. To make it rust free you need to remove all the sealer before treating for rust. and then treating/coating to keep rust away. Pretty much impossible to do because of the baffles unless tank is disassembled. If all the sealer is not removed, rust stays lurking behind the sealer