Well, I have mentioned before that I rub my washed (if they need it and they usually do) eggs with mineral oil, to help them stay fresh longer. It certainly does, too, but I do keep them in the fridge. I am thinking of testing my method by putting a dozen eggs so treated in the fridge and cracking open one each month and seeing if it appears to be fresh.
I actually think that the method referred to above might very well work, because what makes an egg go bad is bacteria through the porous shell. If the shell is rendered non-porous, I would think it might well stay ok. On the other hand, I would wonder if an egg so treated might not be able to be able to get infected with one of the bacteria that grow well in a non-oxygenated environment, like botulism for example. Not good. I would think I wouldn't want to take a chance, were I trying to survive, and just go without eggs until the hens started laying again.
I do not think eggs go bad nearly as readily as people think they do, or how could a hen collect a clutch over several weeks in the summer?
There is also some other stuff you can get to coat eggs that is supposed to give them a year-long shelf life, but would have to look it up.
I can say that the way I treat my eggs DOES keep them fresh in the fridge much longer than if you don't use it.
Those vaseline rubbed eggs could not possibly hatch because they would not get oxygen, and even if you rubbed or cleaned it off I expect the little pores would be all clogged.
Goodness knows I have not tried it, just my opinion.
Catherine