Mesh To curve

Support Modeling
1

I made a model using bezier curve, but accidentally converted it into Mesh. I needed it to be a curve so that I can add Depth to it. Any suggestions?

2

Select one edge loop, convert to Curve, set type on tool shelf. You might want some cleaning after if there are a lot of points.

3

Convert it back to curve if possible.

Edit: late, and like eppo said, maybe need simplification:http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Curve/Curve_Simplify