Would I have to sand back to bare wood to apply or could I paint it over what I have already painted?To really seal it, they make a sealer product for house fires. It locks in EVERYTHING. Then you can paint it any color on top of that. I used it on a rental house one time that had been neglected with cats and the pee stains went through the carpet, through the padding, and soaked into the hard wood floors. The smell was so bad that a few people actually puked when they walked in. That was over 10 years ago, and to this day you can't smell a thing. Of course, you can never go back to a finished wood look, it will always have to be painted.
I rolled it on right on top of the varnished or poly'ed floor. I'm pretty sure you don't have to strip the paint. Might not be a bad idea to rough it up a little though, but not sure. I got it at Lowes at the time. I went in and told the guy what I had and he recommended a sealer for small house fires to seal in the smoke smell. Worked great.Would I have to sand back to bare wood to apply or could I paint it over what I have already painted?