I'm not sure if trying time may or may not have been a factor here Robert.
After painting the bomb, how long after did you apply the future ?
And also, how long did you allow the future to dry ?
The procedure you describe is very much the same one that I use. I too use Tamiya acrylics.
After paint is dry, wait at least 24 hrs. Apply the future, wait again 24 hrs. Then apply the decal using the set / sol solutions. After allowing these to dry, apply your clear cote.
Happy Modelling and God Bless
Robert