I bought an older apartment with wooden floor, so I have no idea what kind of wood is it, what protection was used for it and what actually is that dirt. I was trying to clean it with soap water.
Result of "cleaned" kitchen floor.
- Something was cleanable (great)
- Yellow arrows, I was dark spot which I cleaned but I still have this stains which looks like wet
- Red arrows, I could not cleaned it at all. This mess seem to be inside of the wood
How can I clean the floor and not hurt it? I prefer solution without sanding.
Best Answer
Its rubbed in oil, dirt and small particles of metal. There is no way on the planet you can get it out. Sanding deep is the only option.
You can use oxalic acid, which will bleach the wood and significantly lighten the stains. Oxalic acid is powerful stuff, so be careful.