I have some superficial scratches in my swing arm for carbon AM bike. I'm not worried about them but I figured I'd make use of my Invisi-shield kit that I got a long time ago. The thing is as soon as I go to apply them, I'll get bubbles and whatnot from the scratched surface. Is patching and smoothing the scratches on carbon the same as what we used to do back in the day with suspension fork stanchions?: file down, smooth out, use clear or black nail polish.