ahhhh I see the problem Roy...
you put the clear matt on BEFORE washing.... the acryl sticks to that stuff like a magnet....shoulda washed after the gloss, it's easier to get off the excess like that... or dry brushed your weathering on the glat at worst... my take would be one of a few things:
If the paint is not too thick already, just paint over the top with the OD and gloss, redecal, regloss again, wash, then dull coat.
second choice would be strip the model of paint and start over... (not very appeasing if it were me)
only other thing I could think of, if the paint is getting a little thick with all the coats would be to lightly sand it until is is getting close to the styrene, go to smaller grits till it is starting to get shiny... then paint the top over...
Have you ever used Future? it's a lot cheaper than gloss... I forget where you're from but it's available under one name or the other all over! good gloss for the buck! and your windshields and cockpits will thank you too!
swannysmodels.com sure you've seen people referred to this site but if ya haven't read the future tips it's great! also a good spot on weathering on there...
Tom