Hi, what is the optimal time you've found to work the Flexcoat around the guides? Do you let it set up a few minutes or start applying right away? At what point does it become too thick to work? I'm mixing between 70-80 degrees ambient temp. My dryer is 9 RPM. I'm using the supplies paint brushes. It's runny for about the first 4-5 guides, then gets thick and hard to apply for last 4 guides. However, I can see how the thick consistency could be desired because it lays down a thick coating. It's just that window doesn't last very long - should I have to mix two batches to do 9 guides or am I missing something?