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.
How to remove a scratch from Acrylic (Perspex). If your bath or a piece of Acrylic has become scratched do not despair as it can easily be polished out with little effort. You cannot remove scratches from Frost effect and non reflective finishes by this method, only gloss finishes can be treated this way!