Black stains not fully sanding out
Q: We have discovered many black stains on the hard wood floors after we pulled out the carpet. We tried to sand them out. While some got lighter, others did not. There seemed to be a smell of urine during the sanding, so I’m assuming that these stains may be from pets. Is there anyway to get these black stains out?
A: Your best option is to replace the damaged boards, which, if these pet stains are all over the place, would mean replacing the floor. Option 2 is to stain the floor dark enough to mask the spots. If odour is a concern, you could apply a barrier coating over the stain before applying the finish top coats. Such products as Zinsser Seal Coat or Dura Seal Universal Sealer are dewaxed shellac products that are excellent barrier coatings which dry very quickly and offer excellent adhesion.
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