Like eldo said, bondo is a name brand of body filler. Body filler is basically talc, resin, and a few other items mixed together to form a sandable paste. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Autozone/Advanced I know for a fact sell it. It's fairly easy to apply, just buy those little bendy applicators when you get the can of it. You just mix a little of the red hardener with the grey resin. Mix till it's all one color then spread on like spackle. If you wait too long to use it, it will get crumbly just before it gets hard.