The reason why I'm on such a crusade against GC is because a long time ago I was working on a customers black lotus and he was very specific about what wax he liked, GC in this case. I polished his paint to absolute perfection because that's what he asked for, I then proceded to wax his car with the GC he provided and lo and behold it ruined the mirror finish with micro marring that was visible in direct sunlight and through my point source led inspection light. I was using the most gentle microfiber applicator I had at the time and I had to tell him the stuff was junk and he just wouldn't hear it. I highly suggested collinite 845, but when he saw what bottle it came in he nearly freaked out because and I'm quoting "That #$%@ has got to be garbage to come in a bottle like that!" So I waxed and cringed as all my hard work went down the tube.
I'm sure many would say at this point I'm nitpicking but I thought this is what autopians do. I just don't like that there are a lot of people in this business selling snake oils, even the big names have some bad products. There's a lot of marketing BS brainwashing people into believeing that theirs is the latest and greatest and I wish I could be there everytime to debunk the charlatans stealing other's money with inferior products. Unfortunately this is not the case and I'm left saying the sky is falling, but over time GC will cause more paint wear than a decent two step polish and wax with a fine polish and pure wax.