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.
1 Painters and other tradesmen can cause scratches by resting their ladders and other tools against the glass. 2  Unqualified window cleaners can scratch glass by not using proven construction window cleaning techniques to remove construction debris safely. This type of scratch is also rare if the walls are framed with 2 x 6 studs (instead of 2 x 4), as the sanding block is not as likely to come into contact with the glass. 2  Painters and other tradesmen can cause scratches by resting their ladders and other tools against the glass.