Just thought I would show what I am having done to these components in every engine. Have contracted with this company to do them for us.
It is not a coating in the typical fashion. This PROCESS bonds with the metal and is only 1/2 micron thick. It does not change the dimension of the component. It will not come off unless the metal comes off.
Great stuff and very reasonable. They will not disclose how it is applied or EXACTLY what it is other than a tungsten disulfide.
I selected these parts because they have been proven to help in other engines. Have not decided to do pistons. But every little bit helps.
http://moritzmachine.com/coated.jpg