I sure agree about the Meg's #5, it's my favorite fresh-paint glaze. I've been using up some IHG just to, well, use it up, and "yuck". The #5 is easier to use and leaves a slicker surface. Also holds up better to rain, etc. (not that any of these hold up that well). #5 does dust a little though.
Others are #7 and #81. I've had *one* instance where #80 was too abrasive for fresh paint (3 week old RM b/c), no way I could use it on that paint, its initial bite created marring that wouldn't go away as it broke down.
Dunno about the Menzerna FTG.
Interfering with the curing process can lead to permanently soft paint.