what is guardian? the thin sheet of synthetic that is laid down on wood? if so the lanes i've thrown on with that combo were some of the hardest. lots of carrydown in puddles in the back and worn, textured, dry heads(i always thought viscosity of the oil was being affected by the ambient temp-not sure-but differences between cool and hot days were remarkable). a very strong drilled weak pearl ball was my best option playing basically fallback or whatever the backs give you. but a hockey stick snap was usually out of the question. but, on the plus side this condition taught me to float the heads...after my arm, shoulder, back and wrist give out trying to get through the fronts and prevent roll out with anything but plastic(which hits like crap because of the carrydown).