My single biggest progress and it was a lot of work, a full wash down then paint job. Using a pressure washer, cleaners and brushes I was able to prep the aluminum siding for paint. I then spray a high quality latex paint using a Graco X5 sprayer using a 50 foot hose and 413 tip. I am wildly pleased with the outcome. the siding, softies and fascia look as if they where just installed..perhaps not perfect, but in striking contrast to what they looked like.