View Single Post
Old November 11, 2012, 12:08 AM   #3
jimmy lowboy
Member
 
Join Date: October 9, 2009
Posts: 19
It might be shot peen from a blast cleaning operation. Sometimes the shot sticks to quench oil and the wash operation fails to remove it.
jimmy lowboy is offline  
 
Page generated in 0.03388 seconds with 8 queries