Just a word to the wize here about 1/20th balsa sheets. I used some of this to sheet a foam wing for a half a pylon racer. I covered most of the plane with Ultracoat and used a 12" or so swath of Moneykoat for a racing stripe of one wing. (I liked the color and couldn't get it in Ultra.) The foam under the higher temp Top Flight stuff melted leaving a nice dished out surface in the wing. Under all the Ultracoat all was well. I'm sure some of the thickness of the 20th balsa had been sanded off, Just a heads up as to what can happen. I also had used Lone Star Balsa, got my last shipment from them the day of the fire. Wish I had ordered more.