I have only had one issue with the FEPSA from purebeaver. It was on a Flagstone 95gr beaver. It wasn't so much mottling as the dye bleeding out ......in copious amounts. I kept it and made a hat for myself. I would contact Tim or Lisa and report it. He needs to know if he is getting spotty quality from FEPSA. It has happened with certain shipments. I didn't bother for just one felt as I live in Canada and it was easier for me to just keep it. But at $235 us a pop it can't happen that often.100% Beaver felts from Pure Beaver Supply. This is the second time it has happened, both times same felt and color. The first one I did experiment on making it a Distressed hat. Actually turned out nice and is now my favorite everyday hat.