MashAllah, the car looks awesome.
Btw, why would you m105 it assuming its been taken relatively good care by you and even if there were swirls, they wouldn't have been too deep ?
The 12 hour rule is generic for sealants (more of a best practise) but if you have to layer klasse (which is water based and you are layering it over itself), you could go ahead in a lesser time period (4 hours is perfectly fine there). If you are to layer a different brand, then you should let it cure fully. Ofcourse nothing wrong with letting it cure fully if you have the time.
The car looks great MashAllah.