One of the rear rack holes on my aluminum frame have become stripped after a year of taking the rear rack off at least once a week. I've been using this bike for commuting and weekend riding, so I like to remove the rack when I'm not carrying panniers.
I've asked a few bike shops about rethreading the hole and have gotten multiple responses. One shop there is a tool that some shops have that can rethread it. Another said I was out of luck. One criticized me for taking the rack off often. The last one I asked said some shops could do it but you'd have to go up a screw size.
What's the consensus here on this type of frame repair? At the moment I can still use the rack since it's still secure with the one loose screw. I intend on getting a new bike at the end of the year for non-commuting, so I will make this a dedicated commuter bike where I can leave the rack on it when that happens.