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It doesn’t take years, there’s a fairly straightforward technique (I say straightforward, I gave up trying to explain it to the apprentice, bless him) and it definitely helps to have a decent set of pliers/cutters. I’ll try and take a video later if I get the chance. Essentially you grasp te cable in your left hand, point your thumb on your left, and pivot the pliers where the hinge is on the top of your thumb, a bit like the motion of using a bottle opener. Because of the leverage it’s easier to snap off the insulation when it’s just been scored rather than having to cut it all the way through.
What wires are you stripping?
I’d probably go for a set of the automatic ones tbh. Learning the knack of using cutters/pliers is better IMO, but for occasional bits an automatic pair will make the job a lot more straightforward.