Hi David,
I've turned and finished wet a few times with mixed results.
I ve pretty much tried everything part turning wise. the only wood i have boiled was Cherry and it didn't work at all, but i think it might with other less cracky woods if you know what i mean. But part turning i ve settled on approx 10 to 15% of the diameter. I leave a foot or recess on the outside and then cover the outside and a bit over the rim with lots of cheap screwfix pva, the plaster additive sort, painted on the outside and i lose less than any other method, i ve tried.
I 've used the shavings method and thats a good one as its quite quick, but if you do a lot its another job.
I love roughing out bowls from wet timber as its so quick and fun with the long shavings. Haven't been selling many bowls though so i have loads dried ready to finish.
I really want to have a proper go at thin wall wet turning to a finish though, some of the stuff i have seen really inspires me as very good, just like the work shown above. Something about the bowl finding its own shape i really like.
Pete