My friend Dana found a shoebox of 20 tubes at an estate sale in Toledo last spring, and the guy had done the same plastic wrap thing on each cap. She got maybe 13 of them going again with water and a lot of stirring, but the yellows were too far gone. Her theory is that the wrap helps but it comes down to how tight the cap was screwed on before it got wrapped, since air gets in through the threads. So yours at 11 out of 14 is a pretty solid haul.

Wait, did the flash time change or did the primer actually go bad on you? Because mixing brands is one thing but cold weather is a whole other deal. Most primers have a temp range on the tech sheet and 41 degrees is usually below what they want, so even your normal brand might have acted up at that temp. The orange peel could be from the primer not flowing out right in the cold, not just because it was a different brand. I'd check the tech sheets on both primers before you blame the switch, you might have dodged a bullet by finding out your booth runs too cold for any primer below 50.