[Jonny042]

Looks like a great job on the repair. A small "spot repair" gun would be handy for that job. Mind you spray cans would be fine too but using a gun (or, come to think of it a preval sprayer) would allow you to use professional paint products that will result in a higher quality repair.

A good automotive paint supply place with knowledgeable and helpful staff should be able to set you up. The possible permutations of various products are nearly endless and there is always more than one "right" answer. At minimum you should get some sort of direct-to-metal primer which you could use on the inside and outside, then spray bomb chip guard/undercoat. You could get fancier from there with etching primers, etc. but it's a small area no need to go crazy.