I have no idea about Meguiar's products, they are far to gimmicky and DIY oriented for my liking. 3M makes very specific products and are targeted to commercial use where performance and results count without having 27 (no idea I just pulled that number out of my arse) different bottles.
Apply the 3M glaze in a polishing motion and wipe it off, leaving it will make it hard to remove. All this nonsense like "feeding the paint", "soaking in" and all the rest of it is advertising hype.
If paint were talc based like primer then sure all that is applicable but it isn't.
You are dealing with a lot of dead pigment there the way you are doing it slow and easy is the best way to go IMO rather than bite right into it and possibly burn through.