Looks like spraying the white color over the black edges of the crosses was not a problem?
No, but mostly because it's not done that way. I try to make the masks so that each area is only sprayed once. Therefore the white is sprayed next to but not on the black.
This creates a problem in some cases. When painting white over a multi-coloured background it's difficult to get an even coverage and you are then tempted to lay on more colour, which might end up too thick or runny. You can see a bit of this if you look closely at the left side of the port fuselage cross.
In my other build with the Eduard D.V which has a white rudder and a yellow and green fin, I simply didn't paint the white outline on the already white rudder and I thought that to be solution. However, after your statement/question Kensar, I now think that it might be better some times to first spray the white areas with some darker more opaque colour and then white on top of that. This should work fine, as my experience is that white on top of darker colours isn't that tricky as long as the contrasts between underlying colours are small.
Sorry! Longer answer than I thought and maybe not that clear?!