Good Product or Nonsense?

Back in the late 80's a high end audio shop in Phoenix recommended Armorall on our CD's. Two friends and I did a listening test comparing two different Dire Straits CD's one with and one without Armorall. None of us could believe the difference we heard. And one of us wasn't even consuming beer! If memory serves, the treated CD had better clarity and depth. Has anyone heard of this?

Yeah, but I decided not to try it and got Optrix instead.

Thanks @inna . Might try the Auric. But not into using a Sharpie on my CDs, many of them are collectables.

I have used Optrix and/or other products for years and have found that in most cases an improvement in audio/video performance can be predictably achieved. Getting the right combination of 'tweaks' for a given system takes some time and patience, but the results can be stunning. I'm always amazed at audiophiles who will spend multiple thousands for an equipment upgrade when the potential of their existing system was never really explored.  

+1 for brauser.