Usually, a cloudy finish indicates that you have traped moisture between the finishes. Make sure that you use a tack cloth before painting and the humidity must be low. Never use a damp rag to wipe the surface down just prior to panting. I used this product on my plane with great results. Also, there is an agent in the paint that causes the flat finish. If you get it too thick, you will see this start to opaque the finish. When using flat finishes, a steady stroke and no large build ups is very important. Is't better to go with say, two light coats verses one thick one. Hope it goes better for you.