What to do beside an industrial metal lathe?

I'm a quick learning entrepreneur (currently own a landscape co), who recently inherited a commercial metal lathe. My grandfather bought it from someone who used to production parts for Boeing. I'm starring at this metal lathe and I know that I can squeeze money out of it.....but i don't know how. Best that I could come up with is gun barrels and pens. But given the reality that the previous owner supported himself by manufacturing parts for a major corporation, i surmise those two options would be a good start, however it would be setting my sights low. I am wanting to carry out of landscaping as I have be doing it for 10+ years now. So here is my question: What can I do beside my lathe in order to breed what I currently make ($80000/yr)? Any suggestions? BTW its a Jet1236P if that helps.
"> There's a legitimate skill to machining. Any usable parts would have to be cut to specific tolerances from a mechanical drawing. You'd also hold to know your way around different alloys for cutting, which tools to use for specific cuts, etc.

I'd look into taking a class within machining (local city college night courses?) to get started. Then you can work up a customer foot by taking small orders for simple jobs.

I know several machinists who hold years of experience but don't make anything near $80K. It might be a source of extra income (as ably as a cool hobby).

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