Im strippibng down my blaster to repaint it and cant get either one of the front fenders off. I cant get the screw out thats on the front of the left fender and the screw thats on the back of the right fender. They both have nuts on the back. Im not sure if this is how it comes from yamaha but thats whats holding my plastic on and they're really rusted. Should i try cutting them with a saw zaw? I already tried spraying them with liquid wrench and cant heat them up because ill melt the plastic. any ideas?