I've been in this hobby on and off for the last 20 years. I've only used two other covering materials besides MK. One was Econokote and the other I believe was a covering made by Carl Goldberg (i think) I used it to cover a Sig King Korbra years ago. I bought it because it was the only thing I could get at the time (i was living in England at the time). What ever it was it was a lot easier to use then MK and I can't recall having any problems with it for the life of the plane (over one year). I covered a Hots II about a year ago with MK. I've always thought MK was a PITA to use. I have a Ulitmate waiting for me when I return from Iraq and it's going to get a nice covering of Ultracote. I've heard nothing but good stuff about it. I can't wait to give it a try.