Do NOT cut POLY with mineral spirits!!!!!!!!!! Find a woodworker to fix it, if it can be........ Dont know where you got your advise but its horrible! You do not cut poly with mineral spirits, and using oven cleaner as a stripper is just odd. I wouldnt have stripped it anyways. If it had to be refinished, I would have scraped and sanded it back to bare wood. Then I would have used boiled linseed oil on it and sealed it with 2# cut of shellac. Then use a good whipe on poly, or if you have a sprayer (not a spray can) then spray it. The linseed oil should be left to dry for a few days before the shellac and poly. Not tryin to sound harsh, but there is alot of bad woodworking advise on gun sites...