Hello IN
I received the email, but there is nothing further that can be done if all the rings have been manufactured for this batch, as far as the fit being correct due to contraction.
with regards to the gel coat comments, I would appreciate if you can ensure the gel coat is fully cured before packing to avoid any unwanted marking on the finished rings. The poor finish could also be down to the humidity causing the gel coat not to cure correctly so it may be worth while looking at the drying process you have in place.
Can you confirm when the rings will be sent out?