Ok I have used 3m polish and blitz on my black SE-R Spec V. Then recently switched to zaino. I just keep reading that there is better stuff for a black car. I have no problem waxing my car every week or 2. So I am trying to figure out which is best for a black car, zaino, blackfire or klasse? Which of these is easier to put on and won't leave marks on rubber. It is hard to sift through all the threads and just want 1 comparison between these 3 sealants. And which stores are good to get klasse and blackfire from. Thank you.