I'm new to this forum so please excuse me if this topic has been covered a million times. We built an Ipe deck about a year ago and finished it with Penefin and its past due for a recoat. The homeowner has had some staining and wants to know if there is a way to remove them and if there is any way to avoid them in the future. The major problem was several black stains from metal chair legs. I am guessing that there is a reaction between the metal and the wood/finish. OK put coasters or such under the legs, but she is also getting staining from leaves that fall on the deck. Has anyone heard of this problem? Is it a finish problem? I'm guessing the only way to remove the stains is to sand the entire deck and refinish. Any thoughts on removing the stains and preventing them in the future.