The Blackfire Wet Diamond I have stains like crazy on black trim be sure to tape it off. Longevity is decent but am now using DG 105/111 w/ better results.
Good to know about the BF. I have used both. I like the look of BF better than Klasse. IMO there are better choices than both for looks and durability, but I guess that wasn't the question.
Haven't used that BF product (but have used their polish and regular/old sealant which darkens paint a lot). I use the Klasse twins all the time.
The KAIO isn't much by itself; it really needs a proper LSP over top of it. But it is good stuff (note it's functionally nonabrasive on almost all paints) and it doesn't stain trim IME. Used by itself it'll only last a few weeks and won't provide much protection agains environmental hazards. The hot ticket with Klasse is the AIO topped with (IMO/IME) four-six layers of the Sealant Glaze. Otherwise I'd rather just go with Collinite brand wax.
