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Jim Watson · June 11, 2013, 09:59 AM

One example I found said to use conventional motor oil of a cheap brand.
Be aware that you are actually heat bluing the metal which is around 570F. This is into the draw temperature range for some steels.

June 11, 2013, 09:59 AM	#4
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,541	One example I found said to use conventional motor oil of a cheap brand. Be aware that you are actually heat bluing the metal which is around 570F. This is into the draw temperature range for some steels.