I did see this!
So, you allready stripped off the paint, correct?
Did you clean the shells off with some mineral spirits or damp rag, depending on if the stripper is solvent base or water base.
YOu really keep your house at 76 degrees?
If you did all of the above, I would sand them with some 150 and forget about them until spring.
They will be fine, I have had raw shells sitting in my shop in the summer when the humidity is real high, no issues.
Moisture content in wood is important and you have to try and controll the tempeture and humidity in the shop as best as you can. But to be honest, I am a very small operation and dont have an air conditioned shop (yet) so our lumber get exposed to humidity in the summer. But 30 years of working wood I have had one problem. I built a huge kitchen one summer and it was real hot an humid. Then next winter the door panels had shrunk and revealed an unstained line all the way around them. But this kitchen had a gas fireplace and when I went to look at the problem the fire place was going and it felt like a hundred degrees in there. Well,I told them the panels will grow back once the fireplace is done for the winter, but I touched them up anyway.That was three years ago, have not heard a thing.
Ya, I would not put sealer on them. Why go through the trouble of removing that next spring?
Sorry for the long winded response.