Isn't it possible to protect the guitar by wrapping the clips with tape ?
I ask this 'cause just yesterday i installed the DiMarzio Cliplocks to my VWH and DNA.
But you can minimize the possible damage.
I've stuck a bit of black soft felt to the underside of the plastic bits, cut to size so you can't tell it's there.
I also make sure the clips are away from the body before I close the cases. The genuine Ibanez flight cases seem to hold them in the same spot during transit.
I have Dimarzio ClipLock straps on all my guitars except my DNA and
I've had these on my guitars for years now and I've not had any damage to the finish.
IMO, they're the most "natural" feeling, and best looking of all the strap locks.
I've tried Jim Dunlop and Schaller ones. I don't like them. The strap feels like it's holding the guitar from the wrong spot with those. The Dunlop ones stayed for a total of 1 hour after being installed before I got the ****s and took them off.
The Schaller ones stayed for a day or two.
The Dimarzio cliplocks have been on my guitars for over 5 years now. They just feel natural and look good too imo