I have an Ameristep Outhouse Blind.. I have never intentionally put mud on it, but it has got covered in mud before, thanks to a few nice storms.. I wouldn't recommend doing it because as ksfowler said you need to let it dry out and flake/brush it off; yes this is proper care for it I know, but I has lead to some discoloration on mine. The glare off the new fabric on mine wasn't that great to worry about even out of the box.