I think I have used every type of covering out there except for dress fabric and dope. I have planes that are pushing 20 years old and covered in mono, they look real good. I also have a few that are about 2 years old and have wrinkles. I too believe that the formula has changed a few times over the years. I used to be able to tug, heat, pull, tug, heat pul the mono around the wing tip corners without a wrinkle. I used one of the neon colors and it just would not pull and stretch like the old stuff.

First time I used Ultra, I had the wing covered and it peeled off in one sheet. It did not stick to the balsa at all. I took the stuff back to the LHS, they tried it and could not get it to stick. They swapped out for new rolls and it worked great. I have had good luck and bad luck with both. I have a few planes covered in the neon colors. I did like how they had a paper backing for the neon colors. It made drawing the design on the covering easy. I did find if I sprayed brake cleaner on the covering, I could then slide the next layer of covering in place, let it dry and it was like the Windex method for monocote.

I used to like the old Black Baron stuff. It stuck well, went around corners like crazy. It was just not that strong. It was great for foam wings. It was very low heat.

I tried some stuff from Dymond Model Sports. They had a giant roll of it and they would pull off the amount you wanted so I do not know what it was. That stuff was great. Shrunk like crazy, went around corners, stuck like it was part of the plane. Would like to get more but the store closed their doors.

I did find that if I used the Balsarite for film, before I used any type of covering, it did work a lot better. Some people say you do not need it, waste of time, and so on, but I found it worked for me. It may have been just a getting rid of all dust and fuel proofing the engine bay, but for me it help the covering lay flat and stick well. But thanks to this being Kalifornia, they say it is bad for me and I can not get it any more.

I have a few rolls of China coat. It is thin, does shrink well, goes around corners yet will go so thin you can see the grain and color through the covering. I have had it come apart as I was pulling on it. The color layer pulled from the clear protection layer. It is some what like the Econo coat, flite coat, or other lower cost, low temp coverings out there.

Every covering has good points and bad points. If you try to us them all the same way, it may not work out well.

Buzz.