Non-human? Oh, he's off his rocker.
I recently have come across, thanks to recommendations from the staff at Wet Paint, cold wax medium.
You can see on this next painting the wax that I have rubbed on. It is a bit thick here. It should be rubbed on thin without any ridges showing. Rubbing in circles works best. Let it sit for one day. The next day, rub it again with a lint-free clothe to buff the wax. It is just like waxing your car. When you are buffing the wax, the microscopic platelets of wax are being flattened to overlap each other forming a protective skin. If you don't buff, the painting still has some protection, but not as good as when the overlapping platelets form a skin.
Overall, the wax creates a consistent satin surface to the painting that "feels" more a part of the painting than a varnish. It smooths out inconsistencies in the shininess of the painting surface. In this picture, on the left hand side of the image, you can see the shininess of a spray-on varnish. On the far right of the painting, I have rubbed on some cold wax medium. You can see the difference in shininess.
Also, wax can be applied to the surface of an oil painting as soon as the paint has dried to the touch. Varnish should not be added to an oil painting until the paint has completely cured months later. Wax still breathes and allows the paint to cure. I am very happy with the wax and will continue to use it.