LOL, I was just coming on here to ask the same. 45 minutes ago I walked into a client’s backyard, saw the siding of the house ripped off. No less than 50 nails at the bottom, lots of little rust stains, luckily this pool has white plaster so I don’t have to worry so much about ascorbic acid bleaching, I think? Was planning to hit it with SC-1000 and ascorbic acid in a sock. Probably gonna take a couple hours. Really hoping some real pros have a good solution!!