sorry, didn't read this thread, just saw the pictures. allow me to catch my breath from laughing my ass off.
no, a screwdriver is not the right tool for removing sticking weights from the inside of a wheel. but it's not an unacceptable one. most places i work keep a sturdy putty knife by the tire machine. it can leave similar marks. there's also typically leftover adhesive. plus the standard mix of brake dust, grease, pitting, and corrosion present on the back of most people's wheels.
translation- who gives a fuck. if someone sent a car back to be for a complaint of 'someone scatched the inside of my wheels while prying sticky weights off, my solution would be to rub dirt and grease into the scratches so they were no longer visible. then i'd probably walk next door to the grocery store to retrieve some frozen seafood to hide beneath your spare tire.