chetmarks

I for years used BB in my barrels - hot barrels - pores open- more to reduce fouling rather than protection and there were a few occasionswhen i did re-patch after several weeks and I would get that 'tobacco' stained patch. I really believe it was a leaching process of the BB working itself in to the pore and forcing residue out - rather than the beginnings of rust.

At one time I even considered taking a patch up to the University and have the Science labs test it for contents - but never did make it up there. I still do not believe it was metal.