It sounds as if the Future wasn't fully cured before you applied your decals.
Actually, if your model was painted with a gloss paint, you can skip he "Future" step as it's unnecessary.
Anyway, on occasion, MicroSol can cloud Future if it's not fully cured (at least 24 hours) before application. In most cases the clouding can be fixed simply by applying more Future over the cloudy areas. This should solve your problem.
Good luck..