hey guys I need some expert opinion here. I have a control module (looks like a shoe box) for a kitchen exhaust fan. It's old and tired looking, but unfortunately the mfr doesn't sell a replacement anymore so I will have to repaint it. How do you get the hardened enamel look of kitchen appliances? I've used those $4 spray paint from Home Depot and they don't look very good. What's the secret? Would those bathtub enamel repair kits work well?