really not that bad if you dodnt brush that much
the base is good , you just need to learn about getting more variations in the bodywork
its not like you need to have refs only to get it more realistic
its like you need to find out to work with lighter and darker areas to create depth in a body
also panellines you have to zoom in make a light line (grey) then make a smaller line insede the grey witch is pure black , then a highlight line on the outside of the whole pannelline
i might make a tut of those things , jack made an awsome tut about his highlight brush but imo we need a good basic brush tut about the use of darkness / lightness to create depth and how to make realistic panellines
best way to desribe on your brush is > you have only one tint of blue everywhere > only the highlights you brushed (the more white) are different but in order to make the body pop and come to life you would have different shades of blue all over (depending where there is need of shaded tones or lighter tones)
when i finish my own nsx i will make some tuts about this
best way is to show with pics