The secret to making Ultracote work right is controlling the temp of your iron. Use a digital thermometer (if you don't have a digital kitchen thermometer, I highly recommend one. Makes cooking roast beef and/or turkey to the right done-ness a snap, too) to adjust the temp to the setting that the Ultracote instruction tell you is the adhesive point. You don't want it so hot that the shrinking begins before you've laid out the trim pieces (or windows, in this case) and stuck them down. Then, try to work across from one edge, or end, preferrably, to minimize the air bubbles trapped between the layers. After they're all stuck down good, a quick, careful sealing at the higher temp will permanently seal the edges so they don't lift over time. Just be careful not to shrink too much, or the edges will pull and come unstuck.

Good luck,

Phil