Scratches are not covered under AppleCare+.
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Apple will not provide Hardware Services or ADH Services in the following circumstances:
(a) to protect against normal wear and tear, or to repair cosmetic damage not affecting the functionality of the Covered Equipment;
(b) to conduct preventative maintenance;
(c) to replace Covered Equipment that is lost or stolen;
(d) to repair damage caused by reckless, abusive, willful or intentional conduct, or any use of the Covered Equipment in a manner not normal or intended by Apple;
(e) services to install, remove or dispose of the Covered Equipment or the equipment provided to you while the Covered Equipment is being serviced;
https://www.apple.com/legal/sales-support/applecare/applecareplus/docs/applecareplusnaen.html