2years old. I'm tempted to say it's not mellow yellowish. No longer
can contact original owner. Would acetone or thinner remove poly if
it were oil-based? I'm thinking to test a patch in the closet.


If it is fairly new, just look at the wood. *water based goes on water
clear. *Oil based give a mellow yellowish tinge to the wood. I fit is very
old, it may be darkened anyway. *As the original owner if it stunk up the
house for a day or two? If so it is oil based.