update: I printed off 30 labels, pulled my thermos full of 3 kits of t-30 (well, two and a half, that's the one I've been using from), and got to labelling. All vials instantly developed condensation on the outside, so I had to wipe each with a paper towel just before adding the label, and the time it took to empty it, place the unlabelled, wipe and label, move to the labelled side, then re-set all the vials in the thermos and close it up did let all of them come to room temp.
It was enormously satisfying, and I know from pulling single vials that were labelled in the past that I will be pleased whenever I pull a vial from this batch and realize I don't have to go look up the coa or triple-check the cap color to make sure I have the right thing. I think if I knew for an absolute fact that the single fifteen-minute thaw-refreeze did nothing of any significance whatsoever, I'd happy do the rest. But I don't, and since there really is no way for me to know for absolute sure at the moment, I won't do the rest and will instead just label any new ones that come in; and in the meantime, I'll content myself with a nimbotted label on the outside and inside of the thermos with what's in it, what color the caps are, and the mg and purity; one label for each pep. Oh, and I'll put the recon instructions and units from said recon so I never even have to do the math beforehand, that'll be nice.