If you are talking about Wolfgang Deep Gloss Paint Sealant 3.0, yes, it is a very good Sealant, and extremely easy to work with.
Apply in the shade, let sit 30-45 minutes, remove with your best MF Towels, piece of cake! It gives a finish and look, that looks like you just sprayed additional coats of clear coat, like glass! IMO, you cannot go wrong with any Wolfgang Product, they are all exemplary, and work as they are described to work.
In between re-applications, something like Pinnacle Crystal Mist Spray Detailer is also very good. One of my all time fav spray detailers. Aids in removing any smudges, water spots, dusts, and refreshes the sealant.
Another good choice would be Duragloss Aquawax, and use that as either a drying aid, or as well as a spray detailer. It's another great one to use after a wash for a quick 5 minute detail, and touch up.
Both will help your sealant last longer.
As far as WOWA Sealants from the various makers, yes, they can be used as toppers, but the one shortcoming with these I've noticed (and I've used quite a few of them, yes, they are fantastic, and easy, especially great in hard to treat areas like Door Jambs, etc, but do note that if you have some stubborn water spotting, these WOWAs are often ineffective at removing such.
Thus, you will be in effect "sealing" these spots with a WOWA, and proving somewhat more difficult to remove the next time you wash.
A Pint of WGDGPS 3.0 will last quite a while. Apply thin, and as recommended, let cure, then remove. Also should not wet the car for 12 hours time, to let the sealant fully cure. This sealant you've asked about will wow you.