So
thanks for the replies and apologies for the description.
Its 6 pieces 500 by 200 mm with the edges mitred to the relevant angles to form a tube of sorts.
Top of the table will be rebated in.
No edges of the ply are visible on the sides due to the mitres.
Something like this then?
On different scale, of course, and 6 sided, but the principles will be the same.
For 200mm wide I would apply the veneer using a flat board, ply or MDF, as a pressure plate. 4 clamps down each side will suffice. I usually insert a sheet of padding under the plate to even out the pressure. I use foam carpet underlay. (When we had a carpet fitted many years ago, I asked the fitter for a few offcuts. When I explained my need he cut off a huge area from his roll and handed it over)
Best to add clingfilm over the veneer so that any glue bleed-through does not adhere to the pressure system.
I would do the veneering as the first operation followed by the mitering which will trim the veneer as well.
You will probably find it quite difficult to get perfect mitre joints when gluing up the column. This is where the use of **** beads, as in my photo, are really useful. They not only hide any discrepancies in the joints but also enhance the design and make a professional looking job.
Note the addition of a base. In your case you probably won't need one for stability, but a column is always enhanced aesthetically when it stands on some sort of plinth.
Brian