Hi Bill,
Wet Diamond is designed to be completely easy to use...
You can let it haze until it is dry to the 'swipe test' and remove or
You can apply and remove it wet
Or in between...
Here is my experience with each method...
Haze... If you choose to let it dry to haze completely make sure to give it 30 to 45 minutes. This is not how the product was designed to work but it will. The touchy area is that once you have let it start to haze, it must haze completely or you might get very light 'shadows' or streaking in the paint.
Apply it wet and remove... This has become my favorite method. Apply it to a 'section' (roughly about 1/4 of the car) then remove immediately. Like other high quality acrylic sealants you will feel the surface increase in slickness as you wipe it off.
In between- This would be Angelo's method. Apply it to the whole car then remove. The only problem is that if you take a long time to apply it to the whole car or you have a large car it might start to haze. If it starts to haze you have entered the 'Haze' section. In this case just let it set up for another 20-30 minutes and your fine.
The polymers in Wet Diamond are sometimes referred to as German super polymers and it uses a very advanced delivery system. The polymers reach the surface of the paint almost immediately and begin to link almost instantly. This is why you can remove the product wet (what is gonna stick has stuck) with no degradation in durability, coating thickness, or looks.
You should wait several hours (if possible, but don't sweat it if you cannot) before exposing the vehicle to the elements. This way the linked polymers fully cure. To make sure that you don't remove any uncured polymers during the second coat, it is best to give it 6 to 8 hours between coats. This isn't necessary, in fact you can apply a second coat with in seconds of the first coat, you just may not realize the fullest potential from each coat.
I hope this helps and makes sense!