Hey guys I was called out to do a house wash, and I found the pellet stove exhaust did a number on the siding. I am attaching a picture.  Any input would be great,

Thanks,

Danny

Michael Derose wrote:

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Danny try a little sodium hydroxide on it. 10 oz per 1 gallon of mux. Apply with a pump up sprayer.

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 Ditto, and if you don't have any of that you can use something like greased lightning.