Yeah thanks for your input but no luck so far, still stuck at the final step. I've tried with many armors(currently trying to replace variants of Platemail armor for elves with the Scalemail ones). The material just won't stick to it.

https://imgur.com/a/A6d8i

Left visual panel is the original lower scalemail for reference, right one is the plate armor I'm editing. They're exactly the same, yet it doesn't take my edits into account and if i close and reopen the visual panel it's back to it's original plate materials...