im painting and top coating all blue and black pieces, all other pieces are top coated only. i also painted the clear piece for the scope of the lupus beam rifle, the eyes (which was a HUGE pain in the behind by the way DX ) and the sensor at the top of the head on that same clear piece.
the black and the blue were the only original colors i had problems with, anyway. the blue of the plastic was a little bit too light in my opinion and the black was a weird mix of dark grey and blue, i didnt like that at all so i just painted them black^^
the right red wasnt in stock were i got the cans and there are very little red pieces anyway so i didnt bother painting those.
and since i always like the white of bandais plastic i didnt plan to paint that in the first place. that stuff looks good when its just top coated!
i also didnt paint the parts of the inner frame. i wont see 99% of it anyway, so why bother? :P besides, im all out of top coat now. used the whole 400ml can on the freedom.
so yeah, all in all the way i do it it isnt even that much work in the first place^^ just gotta throw some lining on the pieces tomorrow and im good to go.
edit: here, this piece is part of the wings:
pretty much all blue pieces look like that. im pretty happy with that color! it looks a little less dark in real life though, the photo is a tiny bit too dark because my phone camera sucks a little and the lighting in my room isnt the best at 00:30am^^
i used a flat top coat on all pieces by the way.