Paint chips on the hood are a fact of life. I say just let them be. Otherwise use touch up paint.. to do it right you'll have to use a toothpick to slowly fill the chip, in layers, to above the level of the rest of the car paint. Then sand down with some sandpaper on the eraser of a pencil. Then rubbing compound to smooth out the finish. Then repeat it again in 2 days after you collect your next rock chip.
Options? Ugly leather car bra, expensive 3M clear bra.