Jay, just a thought. You might want to think about turning them undersized and them recasting them to create a finish on them. I had a LOT of problem getting the CA to look like glass over the beans, mine wanted to crack and leave rings around the bean. (Which could have issues down the road)
I would turn it straight and maybe .10 under what it should be, recast it and then finish with the profile you want. The best thing is you now have the PR as a finish and not CA. More work, but I think in the long run it will be worth it. BTW, if you have not done these, a LOT of the tube shows when you are done so make sure the tube is well painted and a color you want to see. My next ones will have a tinted resin.