I have a Unionville Beaver with an 8' wingspan. I needed to do some repairs to this plane as a result of pilot error. I purchased the plane a few years ago and the original builder covered it with dope and fabric. I love the finish and bought the plane because of it. I have completed the structural repairs and done the final sanding. I started doping with the exact same can the original builder used as he gave them to me. The dope was thinned and applied with a brush. In places it went on very well and others not so good. I am doing these repairs in my airconditioned basement with a dehumidifier running constantly. It is not humid down here at all. The red stripe in the photo is where I have had most of the trouble. I hope the photo shows it clearly but the red went "chaulky", almost like ash. I don't know what I have done wrong, obviously something. I need help bad as this plane is the pride of my fleet and I really want a decent finish back on her.