i have 2 tears in my body kit on my truck below both drivers sire and passagner side doors at the bottom of the kit and a couple of scratches on the piece above the passanger front tire anyone know how to fix this my friend told me to buy bondo and a range of low to high grit sandpaper, ive been looking at bondo online but theres a bunch of different ones any one know whihc is the right and also how to go about fixing it if anyone knows