Several months ago, during the lockdown, I decided to build a new bench. Because I didn't want to go get lumber for the top due to pandemic concerns, I had the bright idea to try layering up a bunch of hardwood flooring I had on hand. Maybe I should have run the boards through the table saw to skim off the finish but I didn't, figuring I'd sort out how to remove the finish from the flooring later. I glued them up, edge to edge, into panels narrow enough for my planer but subsequently decided the whole thing was a fool's errand and decided to not use them for the bench top. Removing the finish so the glue would adhere was not worth the time and effort with the equipment at my disposal, despite my desire to reuse materials rather than waste them.
But out of curiosity, I'm wondering what others might have done to glue up layers of finished hardwood flooring and whether there was an approach I hadn't thought of (which is usually the case).