Gary,
Thanks for the advice! I was concerned about Monokote over Ultracote because of the different shrink rates. Based on your advice I broke out the Monokote scraps and went at it. It worked fine over the Ultracote. I'll post the final product soon.
JC
ORIGINAL: GarySS
Monokote over itself or Ultrakote isn't too bad if the area isn't extremely large (say about 1-2 inches max wide) and you can "roll" it on slowly so the air can escape as you go. Use a low temp iron to start with. Then you can raise the temp for a final seal; just don't let the gasses start building up.
Otherwise you could try the "windex" method which many swear by. I haven't tried that yet so can't say.