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leslie_morones

Flooring pros Help Pls!

Vic
2 years ago

So we are refinishing 90yr hardwood flooring with the hopes to lighten the floors and use a WB PU Loba invisible 2k but as the floors were sanded they remained orangy and appear oily in some spots.
Has anyone seen this before? My guess is that they were sealed with oils at some point then oil based poly was added.
How can I remedy? I fear adding more stain won't help and that the WB poly will no adhere. Also, more sanding isn't an option as we sanded using 24 grit and to no avail.
I tried wiping the floor with Mineral Spirits and some of the stain came up on the rag but no noticeable difference.
Can I bleach the floors with that much oil on it? Can I use dewaxed shellac and still use the loba invisible 2k?
Below are pix of the floors sanded, the darker spots are the oily looking spots.

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