FeCL (10-15%)will help bring the contrast in the figure AFTER the browning PROCESS as it will remove the Ferric Oxide more from the steel portion than the Iron.

AND, you do not need this PVC pipe apparatus. Just brush it on the bbl with a nylon brush, let it set about 30 sec to a minute and card it off with wet steel wool.

You guys are WAY overcomplicating this procedure.

Last edited by Stallones; 05/03/16 05:08 PM.