Being black I have a alot around the front bumper, a chip has a white undercoat which really stands out and I have been looking through youtubes but not really found any way to cover up the stone chips other then a respray. I dont want to just dab black paint on them as I've seen rough jobs before and lumps of paint that look like crap. Maybe a black marking pen might work.

 

Black paint pen is your best bet, minus repainting and installing clear bra to prevent further damage.