Vinyl masks

[danharding]

Hi guys I've done a couple of shells recently with a few images or text using vinyl as templates, I'm having trouble when removing the vinyl it takes some of the paint with it and doesn't give a crisp line. I think it's just the height of the vinyl that is causing the problem as all the liquid mask lines/edges are nice and crisp.
What brand/type of vinyl do people use or is there a trick I'm missing.
I'm using Aslan S85 Stencil Film.
Cheers Dan