Liquid Glass (Original) although "Finish First" is their new brand however, I have used both and there is a slight difference. You can still find unopened cans of Liquid Glass on Amazon, I've owned A LOT of cars and not once has it ever disappointed and the paint on all of my cars looks nearly flawless (even my daily drivers). This stuff works....I'm curious fellas, what waxes you're using? They sound "old school." I believe the technology has improved to the point where a spray wax can give you the same shine and protection in a tenth the time of application and removal.
Adam's Detail Spray and BeadMaker are my two Go To spray waxes. They may not last as long as an old school carnuba job would but it's so easy to apply and buff, it's NBD to wax after washing.
However, I'm getting full XPEL on the GT500, so I'll put a few coats on before XPEL to establish the bonding and protection.