I've used Dr. Colorchip for years -- I never noticed removed shine from the surrounding area, but my repairs still look like crap. I'd really like to learn how to properly repair chips so they are imperceptible up close.
No affiliation, but another member on bimmerpost recommended this guy's channel. I subscribed, I liked how he shows every step of his repairs, even though I have not attempted any yet. Here he repairs a deep chip on the front of a Ferrari: