I have to agree with Kurt, laying glass out on tacky areas of the seal coat is not a good thing! Also, there's going to be rough areas where it cures, and other areas that will raise the grain. A bit of sanding will fair things out. But then there's the rub of having to wait for a cure, then might as well scrub the amines off. Instead, how about checking between the seal coat for surface tackiness by using a small piece of glass laid at areas over the surface. You might find that the time within the green stage can allow for the glass to lay with sticking. Worth a try.

The 4 hours can vary either way with the tewmperature of the work area, too. You also might want to check a few hours after the coat for the right time.