Take a look at Rustoleum Epoxy Appliance Paint. This stuff is as durable as it comes..and cheap.
https://www.amazon.com/Rust-Oleum-7886830-Appliance-Enamel-12-Ounce/dp/B0009XEL3U
https://www.amazon.com/Rust-Oleum-7886830-Appliance-Enamel-12-Ounce/dp/B0009XEL3U