I saw that rear quarter and thought 'paintless dent removal', but never mind.
I'm thinking about Eastwood's Optiflow primer system:
www.youtube.com/results?search_query=Eastwood%27s+Optiflow+primer+ system
For an approximate $300 investment, I could bare-metal and primer the '58 Baja, two Superbeetle fenders and a 1940s steel sink top.