Q. I am trying to preserve a 25-year-old hardwood toddler table and chairs. It’s in pretty good shape, but the legs of the table were in some standing water and now retain a jagged-edged water-line an inch or two from the bottom. I sanded the jagged lines, but realize the impact is not superficial and sanding doesn’t do the trick. Can you suggest a solution? Online suggested oxalic acid, but I am not sure where to even find it, assuming it is the right solution.
— MS. MICHAEL HUBNER Ms. MICHAEL HUBNER