First off I'd just like to thank everyone on this site for the knowledge that you share with everyone, I've been lurking for a few weeks now and love this place! I'm just a weekend warrior with a new Ford Explorer Limited in Tuxedo Black. I bought the PC 7424 and used a sealant (Wizards) from a buddies parts store and topped it with P21. I thought that it turned out very nice and everything was quite user friendly. I had wanted to buy a couple of Blackfire products to try and when they went on sale I probably spent more than what I should have! But now I've started reading about the Opti-Coat and CQuartz products. I like the sound of what the CQuartz offers and would like to try it, but here's my question, what to do with the Blackfire products? Why would more people not use these products(opti & cquartz) instead of a sealant/wax combo? The Explorer is a DD and no matter the forcast, it seems to rain within 12 hours of a wash! From what I've read, the CQuartz helps with keeping a vehicle cleaner, correct? Can I top the CQuartz with the BF Sealant and a wax? Thanks and sorry for the long post!