Congratulations!
You guy's are fortunate. I've purchased 4 PSA lower blems and found a blem in every one of them. Granted, I knew they were blems when I bought them, so no surprises there. But I've read many comments online about individuals buying PSA blems and couldn't find a blem. Guess I'm not so fortunate, or, maybe just unlucky.
If it is any consolation, I purchased an Aero stripped lower that was not supposed to be a blem, and it had a blem in the finish (dimples/dings under the anodizing). I was disappointing there. I thought about selling the Aero lower instead of using it, but changed my mind and decided to sand the dings out of the finish and refinish the lower. After sanding and bead-blasting the lower, I used the Laure DuraBake firearm finish to refinish the lower, and it turned out great. That project turned out very well, and it is now one of favorite lowers.
My montra? To every problem there is a solution; and, anything man-made can be fixed or replaced.