[cnavarro]

You could DLC the rocker face which would provide a reduced-friction surface treatment, but the rocker must be properly reconditioned or new - the substrate onto which the treatment is applied is bad, there is no hope for it. We tried many coatings and platings in an effort to reduce cam and lifter wear in flat-tappet engines. In fact, the best solution we found was to use a used lifter, resurface, cryo, and ion nitride the surface which worked well with how the cams were ground and hardened.