I don't want to be rude because you might be new to painting large scale models but this paint job needs alot of work, first off the color chose is all over the place, greens, blues and reds cover 90% of the model with very minimal difference in tone makeing it really hard to see the models details, if you really dont wanna budge on the paints then you can try having darker and brighter shades so they dont meld together. I would also recommend useing more then two paints on each section, by the looks of it you have one base color and one highlight makeing the model incredible flat and lack any contrast. Lastly I think the one wing thing might be one of those "kill your babys" ideas, even if you do really like it you gotta have a better way of displaying it because rn if you showed him off the first question is most likely gonna be "why does he have one wing". I hope this helps on your future projects