If you were going to paint it anyway, you could save money and use round PVC 20mm or 25mm Conduit instead, only using the copper if you wanted to retain the copper's colour. Another advantage is that it weighs much less than copper pipe, and so doesn't strain the light fitting you're hanging it from.
No Bake Microwave Cheesecake (Made in a Mug!)
Hal 9000 costume
Transformers Soundwave Costume
Alginate Mold - Polyester resin copy
Concrete block molds
How to Build a Coffee Table from Reclaimed Wood
Shed Shelves From OSB / Aspenite
How to Select a Lathe
How to make a lifesize, wearable Iron Man helmet
5 Ways to Ruin a Mold Making Project
Mk.1 Arc Reactor Replica
36" SailPlane Build
Camping Hot Tub
Printed Wooden Panels for Your Home (or how to decorate your house like a nerd)
DIY Outdoor Wood Bench
How to build scale Hoverboards from Back to the future.
2 Ingredient ICE CREAM without an ice cream maker!
Smash The Summer Heat With These DIY Water Weapons!
DIY CONCRETE:: Cylinders from Cardboard Tubes
DIY CONCRETE :: Concrete iPad Stand
DIY CONCRETE:: Clock
DIY CONCRETE:: Coasters + Trivets
HomeMade Modern DIY Concrete Lamp
How to Build a Polished Concrete Desk
Concrete guitar stand
Fun With Concrete
Casted Portland Cement Table
Building a small rabbit hutch