Back to the OP - re: pre-wax glaze.
Much underated product and very underused in the UK. Much more common Stateside.
We use this on cars where we have not corrected the paint or carried out light correction - it fills minor/remaining swirls and adds depth to the final shine esp' on dark coloured cars.
We use 3M Hand Glaze - easy on and easy off.
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Re: wax choice - if you are looking for a decent shine and durability try Collinite Insulator Wax. Semi-liquid and if applied correctly ie thin, comes off a treat and stays put for 4-6 months.
We use this as our default wax in our mainstream valeting range. If it can survive a Cumbrian winter it can survive just about anything!