NCZ13. This comes out of my own personal experience. I didn't state it was the truth set in stone.
fair enough, i kinda come off like a d-bag when i talk about this stuff. so sorry about that.
miata looks great =) gold class has a ton of oils in it which brings a super slick feel, and a nice wetness. Only reason i stopped using it was because i had picked up a different carnuba that didnt stain trim.