The rubberized connectors that come with many guitar hangers (and stands) will eat through your headstock paint. I had it happen to two guitars of mine that I am in the process of repairing. Keep these bands away from your headstock.
I bought my guitar hangers from Diamond Life Gear (Guitar Hanger MX): http://diamondlifegear.com/guitar_hanger_mx.html
Response from Diamond Life:
Sorry that this happened and I appreciate you letting us know. We’ve heard of the foam tubes reacting with nitro-cellulose finishes on guitars – this is a known issue that many guitar hanger manufacturers face and it is well documented. But this is the first time we’ve seen a case where the rubber strap has reacted with the guitar finish, and we literally have millions of hangers out there. Your case has been duly noted in our knowledge base. Thanks again for letting us know and I am informing all needful parties on my side.