I'D LIKE TO GET SOME FEEDBACK FROM OTHERS ON THE TOPIC OF THE MOST EFFICIENT PROCESS FOR CLEANING AND SEALING CEDAR SHAKE SHINGLES. IS THE "APPLE SAUCE" A GOOD CHOICE FOR CLEANING? A ROOF I'M GETTING READY TO CLEAN IS MOSTLY JUST GREYED AS I REMOVED MOST ALGAE A FEW YEARS AGO WITH A...