After getting the link to some Auto Car Door Panel Interior Insulation 63' Roll Mylar Back Foam Weather Barrier from Gordy, I decided to give it a try. Normally, I use quilted fabric from Joann's and sew all my covers. However, this stuff is a very good alternative, especially for tails, HL wings and other smaller items.
It can be sewn, but I decided to try something else.....
I took and folded over the material and laid the part on top.
I heated up a sealing iron to full heat. I used a tack iron, but the edge of a larger one will work fine. You can also use a soldering iron.
I ran the iron around the part, pressing down and melting the inside foam and thus gluing the mylar together. The mylar will not melt.
Then cut I out the piece making sure not to cut too close.
I added a couple velcro tabs. I used thin velcro, since the thick stuff is too hard to separate and peels off the foam.
That's it. It took only a few minutes and I didn't have to get out the sewing machine.
I left the folded part, but it might be neater to iron around the whole part.
To press the fold, set iron on medium or work fast.
Repeat for other half.
I cut opposite tabs on each wing cover and put on a little Velcro tab.