Q: One visitor asked, "Our old dishwasher occasionally dripped onto the oak floor, leaving a water stain. The previous owner left some oak sawdust for hardwood floor repairs, but we don't know how to use it. Do you mix the sawdust with oil, water, or what? Please help."

A:The fine oak sawdust was an old style way to fill cracks and holes. It could be mixed with wood glue, lacquer sealers that some use, or polyurethane. Now there are latex fillers, in different colours to do that job. Unfortunately, this oak dust won't help you with a water mark. The mark will have to be sanded or scraped out if possible, and new finish applied. If the stain won't come out, you may need to change the affected boards.