I carry mother's showtime QD in my trunk with a MF towel for bird sh!t and other "accidents" that may etch into the paint if they wait for the next wash. Many "experts"(professional detailers) have told me that QD doesn't remove other layers but won't really boost the sealant either. I'm told the Jeff Werkstadt(spelling) acrylic spray WILL boost your sealant and can be used as a "quick detailer" after a wash.
Just remember, even when your car is lathered with suds, you can still marr the paint by dragging dirt across the car(hence two bucket wash technique). Any time you're rubbing anything on your car that is not completely clear of contaminates, you risk marring. Even after a good wash, when I dry with waffle weaves, I like to blot dry(place weave on car and push down, not rub, then move WW to another area of the car and repeat).
Short answer: Don't use it for what the bottle says. Use it to remove very bad stuff from your paint. If you really want to "brighten" your shine after a wash, have at it. Seriously, after a wash, clay, Klasse AIO, 2-3 layers of SG, all you really need is a wash once a week with a quality shampoo(I like the Meguiars Gold) and careful hand dry, your car will look like it was just waxed.