I am putting down 5 ledgers with panels on each. The representative from the monument company told me that the panels will stain and change colors due to the conditions around the cemetery, the pollution in your area and the amount of trees you have close by.
He said once these stains are there, they can never be removed. Is there something I can use to clean these panels? Is there comething I can seal them with before they stain to prevent staining? Any assistance you can give me would be appreciated.