[Tomsdad]

Originally Posted by Hellboy

I am wondering if it might be possible to just partially remove flexible armor (like shift it to expose some skin to bypass the DR) without needing to pin the opponent.

For example, when Gaston pulls up the pantleg to expose the left calf of Stanley, Stanley is lying prone but doesn't really seem to be pinned, just subject to a leg grapple....

Given that is a loose trouser/hose leg as opposed to armour that was secured in place possibly with some kind of arming garment under it, I'd say we're not talking about similar things.

Nice example of double attack two handed grapple to leg and bite, with part of the grapple being to pull the material back (weather you want to adjust the grapple for that or just have it as special effect given Gaston is IIRC pretty rough and tough in a fight is up to you)