Here is a 3d render someone did a fair while ago. I tried to do it with a orizontal layered structure, but mdf is too weak parallel to its surface even with pins through it, one fell over and broke in half, so that was that :-(
Thing is, I rather like the Corinthian effect, so I may leave it as it is.
If I decide to smooth it to circular I will have to rig up something similar to a lathe. That does sound like a lot of work, but also a lot of fun !!! maybe a tad dangerous too