Our siding is over 51 years old, aluminum siding with pockmarks (great for covering up any hail damage, but a terrible pill to clean) and white. Even though it gets regular power washing, it looked dingy, dirty, and stained. 35 years ago it was totally cleaned by hand and recoated with a coating to stop oxidation, but with time that coating faded off, and the dirt cling to the siding like it were glued on. Our representative or contractor was JEFF SHOLDICE (ID# 008). He came to the door offering the service, a service normally I would not have accepted, but he offered to do a test piece. It looked good, so I decided doing the entire house, garage, and windows would be fine. After he had finished the front of the house, I went outside to look. I was stunned, shocked, and most pleasantly surprised! The house had never looked whiter. Not only was most all the grim and dirt gone, but the only parts that didn't clean up to perfection were where real stains were (and I can't imagine anything taking those out). In truth, I was expecting it to look clean like I usually see it after a power washing, but was so surprised as how clean it really was. Even a luster was present on most of the siding. The windows! Well, they are so clean looking. The method used for cleaning windows leaves windows without any spots or streaks of any kind. They were just super clean. As for how our contractor worked, well, he was an uncommon workman. He worked hard, thoroughly, efficiently, diligently, and with total care, like one would expect of someone doing a very special project of their own where perfection really mattered. He was very informative, instructive, and extremely pleasant. I can't imagine anyone whose work ethic could be better.