I did some tail feathers a few years ago. Everything was by the book and the process went perfect. A month ago I noticed some minor flaking. Figured I maybe should have put a tape in that spot, no big deal. Today I look and there are more spots where the paint is peeling off, even on top of tapes. The plane hasn't even been flown in over a year. The Ekopoly just let go from the Ekofill. As I said, everything was done by the book. No peeling, bubbling or any other defects for over two years before it failed. I'm supposed to be doing the fuselage this spring and already I'm going to have to recover parts I did only a few years ago. Dope is looking good right now.
So now I have a bunch of parts sitting here, done through the Ekofill and needing a top coat. No way am I trusting Ekopoly. If there's about a 50% chance of it failing, as this and other threads show, I might as well try something different. I keep coming across posts that say Ekopoly uses a mechanical bond, while solvent based paints use a chemical bond. Right now I'm leaning towards Ranthane in case I decide to go with Polyfiber for other parts. It's really a shame because the rest of the Stewart system is top notch.