If you want a shiny silver you can get 3/4" structural steel pipe from Lowes that will look gorgeous. Its a schedule 30 pipe and is used to make book shelves, fences or anything a person can think of. You can get it in 2,3 4 5 7 and and 10 foot sections. It has fittings that go with it that use an Allen wrench I am making a really nice plywood lumber rack using the 1 1/4" version that can hold over 8000 lbs.
Or you could use simple EMT conduit , but it not super strong.
You probably don't need the fittings, but they are really nice and super strong, each Allen wrench screw is good to 2000lbs weight:http://www.lowes.com/pl/Structural-pipe-fittings-Structural-hardware-Hardware/4294506723
Here is 3/4" the pipe:https://m.lowes.com/pd/B-K-3-4-in-x-72-in-Galvanized-Steel-Structural-Pipe/1000057731
Go to lowes and take a look at it, it's paintable. You can cut it with a band saw or hack saw. I use a Dry Cut low speed metal cutting miter saw with a carbide blade, but you can use the high speed disc blade type as well.