To remove pitch buildup on blades, mix a 50/50 ratio of chainsaw bar chain oil and diesel fuel in a spray bottle and spray onto blade every minute or so. I have heard stories of using an old car windshield cleaner pump to deliver the solution to the blade. It works very well and I have no pitch remaining on the blade.
Coat of arms. A coat of arms is a unique heraldic design on a shield, escutcheon, surcoat, or tabard. A coat of arms is used to cover, protect, and identify the wearer. Thus the term is often stated as coat-armour, because it was anciently displayed on the front of a coat of cloth in European societies.
The symbols on a coat of arms are meant to represent the achievements of the person, state, or corporation to whom or which the arms were granted. The first documented use of coats of arms in medieval times is on the Bayeux Tapestry, which dates from the 11th century A.D. and chronicles the Norman invasion of England.