Trevor,
I seriously doubt they went to the trouble/expense of adding an auxilary setup that has nozzles, etc to get the piston bottoms coated. The easiest setup I saw was rifle drilling the rods so the oil is actually pushed up through the center of the rod to the wrist pin and then out through another hole at the top of the pin housing on the rod. Cunningham rods offered this service when I ordered my original set of rods from them.
Rick
