Squeeze out a thin coating of lacquer to cover the paper. Let it dry, it won't take too long. Squeeze on another coat, a little thicker. Let it dry. Do this until the dome is full. It might take 3 or four coats.
Oh, and ah, here's one more thing I learned. You can't rush this process. Don't put these in the oven to speed dry. It was bad. The EPA could come arrest you for the noxious fumes. And, don't put it under a lightbulb either. See the bubbles? Just let each coat dry on its own time.