Great thread, picus, and lots of helpful information. Thank you for this.
Re: using the Zaino Z9 and Z10, it seems the Z9 is a cleaner, where the Z10 is a conditioner. It makes sense to use both during initial detail, but thereafter, unless you spill something on one of the seats, do you always use preface the Z10 with the Z9? Or is the Z10 alone sufficient?