I applied unfinished cedar tongue and groove wood, to my ceiling and I applied one coat of minwax fast drying clear polyurethane to it.
I noticed that one of the sections turned a light grey and had streaks from the roller. So I sanded them and accidentally sanded deeper into the cedar wood.
However, since the cedar claims to be unfinished I did not think it would make a difference once I applied a 2nd coat.
Although, as you can see in the picture the light sanding marks are still very visible and make the ceiling look very patchy in that section. What is very strange is that the marks are not as visible if I stand right below it. Any suggestions on how to blend these in?