Vallejo primers do not adhere all that well to styrene, I certainly wouldn't recommend using it on resin.
I don't know what folks use to prime resin, I use Gunze Mr Resin Primer and have never had a problem so I've never tried anything else.
I will probably do a test shoot with some Stynylrez next time I'm cussing it, er, I mean, working with resin though.