I've seen an original car which has stars all over the paint from just that...Stones. One way to help this is not to run track tires but you will still get stars & chips unless you do something inside to cure it. This is this Awsome original car which is driven & enjoyed(Just the way I like em). The paint is well worn & shows many spider cracks in the rear fenders. I spoke to the owner briefly up at La Canada one weekend. He bought the car a while back & has driven it the way it is since he purchased it. I was really excited to see an original car which wasn't a princess car. Enjoy them for what they were built for..
I have seen aluminum with yellow & black stripes. Looks really nice!