Ok, this idea is really out there, a lot of work and as usual I could be completely wrong but here goes. I was reading the "gelcoat repair" thread and Ondarvr replied that you could put gelcoat on a little thicker and once it hardens you could remove the gummy surface with acetone leaving cured gelcoat. So thinking of your predicament I asked him what the window was to do this and he said anytime. He also said it makes a big mess if the area is very big. So, I don't know how much gelcoat you sprayed, we were talking about a small repair but it looks like it would work. Now it's going to take a lot of clean rags and a fair amount of acetone and a bunch of elbow grease and time but it might be something to think about. You'll have to wipe in one direction with a clean side of the rag each time so I'm not kidding about a lot of rags and it would be tedious work. So there it is, now I'm going to go hide!