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.
If not repeat using the pumice stick, then clean again with a liquid cleaner and a soft scrub brush. Do not use on soft, highly polished metals, unbaked enamel finishes, glass, fiberglass and other plastics. Some decorator tile and colored porcelain is fragile and may be damaged by abrasive cleaning materials.UMIE Pumice Scouring Stick. Versatile 100% natural pumice hard surface cleaning aid for ceramic tile, porcelain, concrete, brick, stone work, hard metals, and hard plastics. Removes stubborn lime, rust, stains, and paint.