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 coat of arms generally refers to the, cape, shield, crest and helmet, while the family crest technically only refers to the small image that lies on the helm (top of the helmet). The family crest is a component of a coat of arms, which can be used as a simplified symbol when the full coat of arms is too detailed. British heraldry rules only allowed a firstborn son to receive his father's crest upon his death.