Re: agree witht that opinion, question
Sgian Dubh
"How would you glue up a hexagon?"
Well, if the joints are just mitred I'd probably just look to tape them together, which is a method I've used several times in the past, sometimes using just masking tape, but also I've used clear plastic tape (commonly known as Sellotape here in the UK), or strong fairly thick packing type tape. Either of the last two might be better because they have better ability to stretch a bit if necessary to pull the joint a bit tighter.
I suspect you already have a good idea of the routine: lay out the parts with their inside faces facing down on a flat surface, and roll tape across all the joints, one strip near the top, and another near the bottom, then reinforce each intersection with extra tape. Next, flip the open column over, roll it up into its proposed assembled form to check everything goes together right. Then add glue to the mitres, roll it up again, and tape the last joint closed tight.
Alternative or supplementary pressure application means might include strap clamps, elastic bands or stretchy tyre inner tubing, a Spanish windlass type arrangement, etc, particularly if the basic mitres include some additional reinforcement, e.g., biscuits, tongue and groove, Dominos etc. Then, of course, you could always make a fancy assembly and gluing jig, which might take longer to do than just making the darned column itself using relatively simple techniques, and timewise, that might even include all any carving or turning.
However, where the mitre joint is long grain to long grain, as in this case, I can't see any advantage in adding any of the just described reinforcements - they make it harder to pull the assembly together, and if the plain mitred butt joint is executed well, it's just as strong a glued assembly as a flat panel job, e.g., a plain butt jointed table top or a cabinet panel or top.
Well, that's just my opinion, and I could be all wrong, but I do like to try and keep something like this that could easily become over engineered and unnecessarily complex rather basic if I can - it's also, as I'm sure you know, working on the KISS principle, ha, ha. Slainte.