turbosupra- Welcome to Autopia!
I used the Klasse twins for ages, still do use them for a few things. IMO they just don`t give all that great a look compared to many other LSPs (Last Step Products, i.e., "wax" or sealant).
For the most part I`ve switched my previously-Klassed vehicles over to FK1000P, which lasts longer, protects better, cleans up better/longer, and looks far better IMO. Hands-down my fave LSP overall and the most impressive stuff I`ve used in over 40 years at this stuff.
Some people won`t like how it looks on colors like red, but if you were happy with how KSG looked I`d be surprised if you were dissatisfied with the FK1000P.
Plenty of other Autopians will suggest products that will probably, to a very discerning eye, look better on some (perfectly prepped/maintained) paints. But I`d bet none of those will last/protect like the FK.
No, I wouldn`t top it with a wax because that would preclude adding another coat of FK1000P later.
OK..there`s my (oh so predictable) opinion. Now lets hear from people who want a better look that the FK (let alone the Klasse) will give..I`ll be surprised if somebody doesn`t recommend using Pinnacle Souveran (which I do use on one vehicle) even though it needs redone at every wash. I myself don`t want to be waxing every month/quarter/etc. but some people find it enjoyable. Just watch that you choose something that will at least rival the KSG * 10`s ability to protect against etching.