Due to air pollution regulations its really rare to see paint baking operations here in Southern California. It used to be quite popular back in the 1960s-1970s. Most of the paints/coatings have been reformulated to meet air pollution restrictions; basically taking out the VOCs, volatile organic compounds, that create the airbourne pollutants. I do visit a customer that does baked coatings, but they're specialized coatings used on military/aerospace parts (really, really expensive, not cost effective on a bike frame). Powder coating is really popular here in So Calif, and baking is an integral part of that process.