I am still in the "heat did it group" ,only due to visualization of the flow pattern and staining. I am thinking of a extremely high temperature gas and inert gas combo. Jim
Kentucky that is probably right for you rich guys but I was far from rich for many years. It would be my luck to mutilate a coin and then find out that it was valued in the 10 figure class...I still pick up coins from the sidewalks and parking lots when I can see them...Thanks for being kind and not making me look like the fool I some time's am.
352sdeer..390 Ford Big Block..fine engine had one in a 1966 Comet Cyclone GT....not easy on gas...but seldom had any traffic ahead of me.
352sdeer I see that you have been posting so I expect you either did not do the Tesla experiment or that you may yet be awaiting the results. How is it going?