"John" wrote in message
news:Qd7Tn.5333$cG5.5144@hurricane...

Be very careful - it could be Cyanide

I was going to say that. When I did my engineering apprenticeship in the
late 70's, ( proper 5 year apprenticeship not like these 4 week NVQ's or
whatever they do today ), we used a Cyanide powder solution to case harden
the scrapers etc. we made.

John