Little, but deep chips like that are a tough call.....
You need to get the rust either off or completely stopped with a rust arresting product or any paint you try to add will fail.....
Folks have put up links & pics of some newer spray products that will do that, I'll see if I can locate those threads....
Then a fine sanding to smooth the general area, perhaps a hi-heat gray primer, then a high heat paint, heat set in between fairly lite coats, then extra lite sanding, then a couple coats of carefully fogged hi-heat clear.....
At least three, maybe four products, a lot of watching paint dry & it still will not really match up to the original baked porcelain enamel.....
Most folks call them 'battle scars' & just go with it......