A couple of months ago I put some Minwax Sanding Sealer on a Magnolia hollow form(endgrain) that had dried from a magnolia tree cut 3 yrs ago. I decided to put the piece back in the lathe and sand it some more. I assumed all the sanding sealer was completely gone. I got around to putting a coat of Min wax Wipe On Poly(not the water based one)on it.There appears to be places where I see a line of one finish or light place..I see several places like this. I sanded the entire piece through the grits and wipe it down with a damp rag and still see some.Should I put more wipe on poly on it....sand it some more or does anyone have an idea what might have happened? Will more coats maybe help it?It is hard to describe it and I dont think I can get a good enough pic to show it.