I DID NOT CAUSTIC BLUE THE DBL BARRELS, DUE TO THE SOFT SOLDER AND THE TEMPS. NECCESSARY. I USED THE DICROPAN-IM WHICH IS APPLIED THEN THE BARRELS ARE DIPPED INTO THE HOT WATER 212 degrees max. tHE UNDER SIDE OF THE BARREL RIB HAD TWO PRE-DRILLED HOLES ALREADY, AND THEY GET PLUGGED WHEN I APPLY THE DICROPAN, BUT REMOVED BEFORE IT GOES BACK INTO THE HOT WATER.
THE BARRELS WERE POWDER BLASTED, I DO NOT HAVE A BEAD BLASTER BUT KEEP CALLING THIS MACHINE A BEAD BLASTER. THEY ARE NOT FLUID STEEL, I AM NOT SURE WHERE THAT CAME FROM, BUT THE TOP OF THE RIB IT STATES "LONDON FINE TWISTED STEEL", THE TWISTS ARE VERY VISIBLE EVEN AFTER THE BLUING, AND CERTAINLY THEY WERE NOT UNDER RUST-O-LEUM BRUSH PAINTED BARRELS.
AS FOR THE BLUING ONCE COMPLETED THE BARRELS ARE SUSPENDED...NOT SET IN...BUT SUSPENDED IN WATER DISPLACING OIL FOR 48 HOURS FOR THE WATER DISPLACING OIL TO STOP ANY RUSTING INSIDE THE HOLES OF THE TWO BARRELS AND ANY WHERE ELSE IT COULD BE DUE TO WATER OR EVEN MOISTURE.
