As a completely different option, considering the end of the barrel is clearly pitted, mask off all but the last 2-3" of the barrel where the rust is with some waterproof tape, and then treat it with...
Type: Posts; User: hotbarrels
As a completely different option, considering the end of the barrel is clearly pitted, mask off all but the last 2-3" of the barrel where the rust is with some waterproof tape, and then treat it with...