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To be honest, I dont know it. I changed, because my workshop smelled always like a french fries restaurant, after the hardening and heat treatment. I using an old friteuse for the process. I hoped...

Hi Gregg,

I using this one: Härteöl 5 Liter Kanister: Amazon.de: Baumarkt
But I dont think, the oil is the problem. Before this special hardening oil I used simple canola oil too and it also...