Painting an air compressor tank

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I've been slowly making my way through (nearly) every post on this forum through the years. The generosity and effort of the regulars (Steve, Jay, Henry, etc.) especially, is unbelievable. I find your insight very helpful, and appreciate all of the tips you've given me...even though I've never posted a single message before.

So now for my first question...Although it's not a hard one, I like to do things right the first time:

I've got an older air compressor, a Campbell Hausfeld with a 20 gallon tank. It has some superficial rust and scratches on the tank. The compressor's old, but it still works great, and I'd like to give it a cheap facelift. Something fairly quick and inexpensive.

Can anyone advise me as to how to get the tank prepped for painting? It is oil-lubed, so I'll need a cleaner that cuts grease really well.

Is there a durable paint I can use that will bond to the old paint?

I know...I sound like I've got too much time on my hands!

Thanks