Either paint that has been stripped back or something from the brazing process has got into the threads for the cable guide on the bottom of the BB. Will that just come out when the frame is shot blasted? Or does it need something else to sort it?
He gave it to you like that? It has flux all over. Put it in water over night to get rid of the flux. Remember it is mostly boric acid so don't touch it without washing your hands afterwards and take care
Question for @hulsroy
Either paint that has been stripped back or something from the brazing process has got into the threads for the cable guide on the bottom of the BB. Will that just come out when the frame is shot blasted? Or does it need something else to sort it?