That's about how old mine is. I'm a professional painter by trade... but not too sure if I should spray it with enamel. I might spray it and set it aside for a few days to let the paint fully cure. My worry is that condensation may build up on the painted screen and drip back into the tank. I'm probably worrying a little too much about it, a replacement is about 45 including shipping. What do you have in your edge ? Do you like it ?