I've discovered the perfect frame material, True Temper OX Platinum, which supposedly gets stronger at these temps rather than annealing and losing temper. As soon as I can afford to I will buy a set from henryjames.com. It costs about the same as what my source wants for NOS 531.

The cloisonne idea is wonderful. The only instances I can find of it being used on bikes are the headbadges of Rivendells and Bike Fridays.

You've got me imagining something with the intricate detail of a Russian icon. Much more exciting than a powder coat. Can this type of enamel withstand prolonged exposure to rain, and is it capable of withstanding impact? My goal is to build a long-distance loaded touring frame, so it would definitely get exposed to nature.