I’ve got a timber table under cover outdoors but gets a bit of moisture still. The wood has black mildew in it, I sanded a section (polyurethane coating) and the mildew has gotten under the coating. Any way to treat? I want to sand and coat with marine varnish if I can get rid of the mildew without bleaching the wood.
248600cookie-checkMildew in wood
If anything will work it’s Sugar Soap. Spray on and rub in with a stiff brush. If that doesn’t shift it try oven cleaner. This is the same approach but with a stronger chemical. Try a small amount on an inconspicuous section of the table first though, although I’d be surprised if it damaged the wood. If they don’t work then I’m afraid you’re out of options