White spots problem

[Spey_Phantom]

For some time now, every model i paint in matt olive green (exs: the apache) is having a problem with little white spots on some places on the fuselage (in this case the weapon pylons, landing gear and the engine pods   . I tried cleaning them of with a wet cotton swab, it seems to work, but 20 minutes later, its gotten even worse, i tried repainting, but it seems to byte its way through  :dum: .

does anyone have any advise to counter this problem    

[noxioux]

Maybe throw the paint away and buy some new.  If it's not the paint, then I would guess it's the surface underneath.  Are you putting down a primer coat first?  Does the paint ever eggshell or crack on you when it dries?