SWETM- Thanks for the heads-up about the BHAB doing the "darkening" thing! That`s why I stripped the BFAFPP off and I would`ve been mortified had I bought something else that does that. It would be nice to do a bit more filling on the `93 Audi, but I do have a lifetime`s supply of 1ZWPS for it (which works fine under the FK).
Fortunately I don`t need their other offerings (I`ve checked out their stuff before), but I do absolutely agree that they`re an underappreciated line of products that more should be familiar with. Sorta like Wurth IMO (my usual choice for such stuff).
What color do your Audi has?
Yeah on some paints the darkening effect is not so nice. This where on a metallic blue VW paint I tested it on. It was not much of it. But a test spot showed it when looking closely.
I would test Angelwax AG wax which is made for silver metallic car. That has some crazy filling ability from it. Then you need to have a silver metallic paint LOL.
Yeah Würth has a range of different high quality products to the care of the undercarige of vehicals.