Stains are deep enough into the wood that almost no amount of sanding will remove them.
Floor stain damaged.
If your wood has only small defects and the remainder of the wood is fine you can spot sand and stain.
Here we add another flooring damage example provided by a reader.
4 for a dark stain apply bleach or oxalic acid according to label directions to lighten the stain and then lightly sand in line with wood grain using 150 grit sandpaper.
Fold a piece of 100 grit sandpaper into a small strip and then use one.
On most floors stains gaps buckling warping and mold are water related or moisture related problems in flooring systems.
If you are concerned about mold contaminated flooring.
Stains are the toughest fix when it comes to hardwood floors.
5 mix up a stain to match the existing floor color.
This process usually requires testing.
We think the floor shown in the photos here was damaged by a solvent spill that was left unattended.
3 wipe the area with mineral spirits for an oil based stain and water for a latex stain.
Bondo is an alternative to normal wood fillers preferred by many furniture restorers on hometalk.
One stain or water ring can ruin the look of the whole floor.
Mix up your bondo apply to the uneven damaged section then sand smooth.
If you have small areas of damage in your hardwood floors you might not have to refinish the entire floor.
Pet urine stains on wood floors pet stains can ruin wood flooring.
Pet stains on wood floors.
You may be able to repair stains nicks and scratches.