Style chooser

is there any product can do DIY touch up?...coz my door had a few paint chipped down due to my door protector rubber's steel which contains in it, and it chipped down my door paint, i guess i need to do something before it rust...so is there any thing can i do wit it now?...

and is that possible i can do DIY touch up for my bodykit? since there slightly a few scratch on the kit...dun wanna spend money to repaint whole thing, waste money -_-"