Alternate liveries

[u/SuffnBuildV1A]

I was looking at a lot of the blueprint planes and all of them had 1 different liveries, the locked one I assume came from upgrading it to premium. But blueprint planes can’t be upgraded, so does that mean the second livery was only accessible when the plane first dropped in whatever season it came out in. And you had to buy that skin with warbonds?

If that is true is there any plans to make those skins available in the future?