I believe that the amount of time you must leave the wdgps on the car before you wipe it off is 45 minutes.
Instructions are posted towards the bottom of this page, see step 4.
Wolfgang Deep Gloss Paint Sealant delivers a deep, wet, liquid shimmer unlike anything you can imagine.
Recommendation is for 30 to 45 minutes, actually it's let the product dry to a haze before removing with the key word being dry. The goal is to apply a thin coat and if a thin coat is applied then in moderate climates the sealant will dry to haze in 30 to 45 minutes. You could probably use the Swipe Test for this particular paint sealant to test if the wax is fully dry before removing.
Stu, I apply all my lsp's by hand. Not a big fan of applying wax or a sealant by machine.
This just goes to show how much detailing is personal preference. I'm just the opposite of Dana in that ANYTHING i can apply by machine I do apply by machine.
When it comes to finishing waxes and paint sealants I prefer a DA Polisher with a 6" or smaller foam finishing pad on the 3.0 to 4.0 speed setting. I never use a rotary to apply a finishing wax or paint sealant and while you can use a Flex 3401 to apply a wax or paint sealant, if both tools were in front of me I would choose the DA Polisher just because it's easier to use with one hand for both vertical and horizontal panels.
Again, this is just my personal opinion, a flat, uniform surface with equal pressure over the entire surface, oscillating at the 3.0 to 4.0 speed setting a tools like the PC 7424XP, GROP, or G110 will do a better job of applying an even coating than your hand pushing down on a wax applicator pad.
Dana has a good point about something, or more specifically, any kind of abrasive particle entering into the waxing or sealing process, but from experience, if you're working clean in the first place then by the time you get to applying your LSP the risk is somewhat nominal as long as you're working undercover, (not outside in the wind).
Just my personal preference.
