I recently had to clean my combination composite decking/cedar rail deck. I initially cleaned the composite with Corte Clean and was quite satisfied with the result. I could not locate a wood cleaner/brightener that was composite safe – – – most are acid based. I then decided to mix a batch of Corte Clean and apply with a garden sprayer to the cedar rail. All I can say is ‘WOW’. It cleaned and brightened the wood extremely well – – – and obviously did not damage the composite. I’m not sure you want to enter the wood cleaning segment but if you do, you’ll have a winner! A very satisfied customer. Michael Ullman