I've made a set of seam guides for LaFemme, along the same lines as (but probably not as comprehensive as) SnowSultan's. I'll submit them to freestuff, but if anyone wants to snag a copy in the meantime you can find them here:

https://mega.nz/file/WzwSQAQZ#Lw8CqSufdM2MHNma7am2H1CE7yKn1bFkS2KHhKed7OU

@igohigh: LaFemme's leg seams are straighter than V4's at any rate, but they're still up the inside of her legs so not ideal for stockings. Seam guides would be helpful in making a second skin, but I feel it would still be an uphill task, and a 3D painting application would make the job a lot easier.

I haven't personally seen a fishnet second skin for V4, but would be more than happy to be corrected on that score.