Located in Venice CA, this client had installed a framed off white linen ceiling which was stretched over a frame, then attached to the ceiling. Water damage from a storm caused water leaks, causing water stains the size of a small car. We went and obtained a swatch of fabric and brought back to our plant. I climbed onto our roof and found some dirty roof water and had let it soak for over night. The following day we spent time figuring out how to remove the staining. Our test was 100% successful, we went back to the house and proceeded to remove 98% of the water staining. Our client absolutely loves us. So does the contractor that only ended to pay us a small amount compared to the enormous amount if we were not successful.