I had friends who visited the Soviet Union for a rocket contest and the Soviet Aerobatic team had their planes at the near by airport. They sent me several photos and that plane was among them. I had modeled Jurgis Kairys's plane that was green and yellow with a flying alligator painted on the side. He was the world champion that year but the last I heard had disappeared in Lithuania.
If you are having issues with this paint you should contact the manufacturer they would want to know and are usually happy to help. Sometimes you can get a batch that is not quite right. It is rare to have that occur but it has, does and will happen now and then.