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.
A family crest plaque or coat of arms may be unique to not only a family, but a person, corporation or state as well. Coats of arms belong to the tradition of heraldry, which refers to the design and display of the arms. When towns, countries or villages use coats of arms, it is called civic heraldry.