Best product for treating old vinyl

My best friend's co-worker does upholstery work kind of as a hobby and a side money maker. So I got the Buddy Buddy deal... 250 for the front buckets including material new Springs and foam totally custom.. but turned out so nice I had him do the back seats too... I had to save for a little bit but that was okay...
Alligator skin...
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Very cool! Mine are in pretty good shape. They were recovered over the original covers, so they are double covered. They did a good job, too.....it's just kinda dated. I would guess the covers are probably at least 25 years old...maybe older. They are gonna "have to do". lol