I have low pitch, lead coated copper standing seam roofs over porches that get runoff from cedar shingle roofs. They have developed a yellow/green stain the won't come off with power washing, conventional cleaners like Simple Green or solvents like paint thinner. Does anyone know whats going on or how to clean these roofs? Thanks, Charles
Charles Kulicke
2016-05-23 11:21:51.000000
Have you tried a metal polish type of cleaner? Might want to try that in a small, non-descript, spot and see how it cleans up.
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