One-Shot Lettering Enamel 1 Shot Lettering Enamels are oil based, high gloss enamels for interior and exterior use on metals, wood and glass; and have been the benchmark in lettering enamels for over 50 years. Excellent flow characteristics, single stroke coverage and vibrant durability are just a few of the reasons 1 Shot Lettering Enamels remain the favorite of pinstripers and sign painters alike. With their infinite color blendabilty and a full line of reducers and hardeners, it's no wonder 1 Shot Lettering Enamels are used by more sign and graphics professionals, than any other brand.