IIRC people have done the glaze-over-sealant thing, but only for specific reasons (e.g., a car show) and the whole thing alway left me sorta
If you want to do some concealing (and IME it won't be all that significant), I'd try the
Meg's glaze over their #9 and I'd top with something like
NXT.
As I've posted a zillion times, if I use KSG I don't top it; I want to be able to add more. The ability to layer is a huge part of why I use KSG in the first place, and giving that up for whatever reason is never worth it to me. If you have flaws you want to conceal, I'd just go with a different approach and save the Klasse twins for vehciles that are basically marring-free.