I haven't had any issues with it marring, in fact I find it works very well as a finishing polish. Not saying it can't happen, but what you need to do to be sure is:
- polish a small area to perfection
- do at least a double IPA wipedown
- examine the surface
- wet a brand new applicator pad with water and apply to the surface
- examine the surface, verify that the applicator did not cause marring
- wipe down the surface with your buffing towel
- examine the surface, verify that your buffing towel is not causing marring
- apply ZAIO with a brand new applicator
- examine for marring
The above steps will rule out any other causes.