Averages are for Corvallis Municipal, which is 5 miles from Corvallis.
Warnings. Do not use pumice stones to clean marble, laminate, plastic or fiberglass toilets; doing so will result in permanent scratches. A dry pumice stone will also scratch porcelain, so be sure to keep the stone and the toilet surface wet at all times.lean With a Pumice Stone. Before cleaning a porcelain toilet with a pumice stone, you must thoroughly wet both the stone and the surface to be cleaned and keep the stone and the surface wet as you work.
Pumice is a form of volcanic glass that is rich in silica. There  are also fairly high amounts of aluminum oxide, sodium oxide, and  potassium oxide. The holes or vesicles a â¦ re the remnants of gas  bubbles that formed when the pumice was still molten.umice stone a highly abrasive material and because of this it is  commonly used to get rid of any calluses or dry skin from the heel  and the base of the foot. In ancient t â¦ imes, however, pumices stone  was also used by Roman and Greek cultures to get rid of excess hair  from the body.