As an owner of a 2003 black daily driver that I will drive into the ground, I am always in pursuit of a great glaze to hide marring. Unfortunately, I have not found one that will hide marring AND last an appreciable amount of time. One negative that I have experienced is also a partially compromised LSP. No matter what I put on top and no matter what the marketing gurus tells me about "zero impact on wax/sealant durability because of 100% compatibility", LSP longevity is measured in weeks when I use a glaze - Stuff just never lasts as long when a glaze enters the process. With that said, the ones I tried and liked for filling capabilities:
CG Glossworkz Glaze
CK RMG
1G Omega Glaze
Prima Amigo
I have some light swirling and the above products will hide 75%-80% of the marring. Durability is the time between application and the next washing session :wink
Also, keep most (if not all) glazes away from plastic/rubber trim or you will have a hard time getting it off.