I have been using the brush-on Daler Rowney for quite a while now with great success. I think it was here on LAF that I read about it. Perfect for metal, resin, plastic...but not PVC.
I found out that both my Reaper Bones and Walking Dead miniatures were getting shiny and sticky after several months. And the only thing they got in common was the varnish. Both Bones and Walking Dead were not gloss varnished with a spraycan as I had read enough horror stories about that combination (and my Zombicide miniatures are still sticky…:().
So no, it’s not a scientifically proven fact, but I recommend not using bvrush-on Daler Rowney on PVC miniatures. I will now only use the brush-on Army Painter’s anti-shine on them.