Sir,I have applied a coat of Red Oxide Primer (Berger brand) inside surface of my newly purchased cooler.The job of refurbishing the cooler can be outsourced. There are chaps available in any local market. They typically charge Rs.2K for the job for a large cooler. I get this done every two years.
Is Primer sufficient or should I apply a coat of paint enamel too to make it Rust proof???