Not really, it's rather Urban Fantasy, and if a robot can be accepted, PATCHES THE GREAT should be fine. \
...I don't know how chemical stuff works in R.O.D, but I'm pretty sure paper is still plenty flammable in stacks. Being thicker does not make it flame retardant. In fact, it actually gives more fuel to burn for the fire, so I'd say it'd burn faster. Making a stack of something doesn't change the thing's chemical properties last time I checked.
Yep, you're just letting the fire burn hotter and faster. Of course, you could ditch the flaming stacks but doing so would reduce the armor to protect from the next attacks. Plus, Wiley Pete don't give a shit, it'll burn through it without any trouble.
EDIT: For that matter, read the manga. Far better. As is James should be freaking out of paper by now.