Robobble

OK, my car has roughly 1 billion white marks from rocks and such and it's really starting to **** me off. Scratches, dents, dings, you name it, my car has too much. I swear it attracts rocks. The other day on the highway I heard a loud smack and I was like WTF! I got to where I was going and one of my headlight covers had a huge dent and was broken in half and hanging off. That rock must've been 1/2" across. Anyways, does anyone know of a good product to fill those with without sanding or anything time/money consuming?