Hi all I'm looking for some help/advice.  Flew from Pittsburgh to NJ today.  The plane is about 10 hrs out of annual and I noted what I initially thought was bugs but on inspection it looked more like grease.   No sign of oil anywhere.  I cleaned it off ran it up, cycled the prop, and took it around the pattern.  Noted a definite pattern of grease on the prop blades.  I took some photos but because of the sun needed to doctor them significantly to make the pattern show.   Tomorrow I'm going to