Impact Valve Rod Lube

I’m in process of reassembling my M3 after installing the power block kit and was curious if a person should lightly lube the valve rod or leave it dry?

It seems like a small amount of silicone grease would be beneficial in the area where the valve rod passes through the plenum end to help reduce stiction. However I don’t want dust collecting on the valve rod where it is exposed in the main block area.