Originally Posted By: barrel browner
In Birmingham many years back there was a place that did the best colour case hardening, outside of the workshop was a large water trough that was also used by the workers to pee in some say this helped the colour!! worth a try I have the old Johnsons formula for colour hardening I will see if I can dig it out


Yes Keith, Barrel Browner in the UK mentioned it on page one of this thread.....above is that posting......

Best,

Doug