Here are some photos of my '39 p/u. I had a local sign painter/pin striper do the doors. Big no to any type of paint type clear coating. Try Gibbs oil if you want to preserve the patina. My '39 has an 8ba so no fan generator mount issue. Many won't agree with me but when you rewire your truck convert it to 12 volts. If you want a 12 volt original looking generator that is an alternator look into E.J. Whitney in Fullerton, CA JMO
Classic Automotive - Converting Vintage Automotive Generators to Alternators: E.J. Whitney Company, Inc. - Fullerton California