Materials
Stains on wood
On wood, don't sand in a panic. Scrape wax cold, wipe spills immediately, and remember finished surfaces take more than raw wood. Always test in a seam.
More stains on wood
MildewWood
Mildew Stains on Wood — How to Remove Them
Mildew stains on wood appear as dark gray or black patches caused by surface mold, and you can remove them with white vinegar and a scrub brush if you act before the spores penetrate deep into the grain. Unfinished wood needs more aggressive treatment than sealed or painted surfaces, so adjust your pressure and product strength accordingly.
Candle waxWood
Candle Wax on Wood — How to Get It Out
You can remove candle wax from wood by freezing it until it hardens, then gently lifting it off without scratching the finish. Most wax comes up cleanly with a plastic scraper, and any oily residue wipes away with a little white vinegar on a soft cloth. The key is to work slowly and never use heat directly on finished wood, which can cloud or crack the varnish.