I have a quick question. If I'm down to bare wood am I able to get a "preview" of what the wood would look like with poly only by wiping it down with mineral spirits. Is that the color that I would see if it had no stain and just poly?

Freshly finished floors do look like what paint thinner on the wood looks like with poly on it...
Water based finishes are different than solvent based finish.

I’m just trying to imagine what the natural wood will look like without stain. I want to do just poly because I like that look but there seem to be areas that look almost gray.