You should also try to take more time in painting, and dont stop until it looks as best as it can. clean your paint up. it might be me or the camera quality but i see paint where it shouldnt be. It takes practice and patience and lots of crappily done models (trust me, i did 26 crappy models before i got it.) to pick up tricks that help you do that, you just habve to keep painting, and if buying more models goes against your budget, strip and paint again.
all i've done on those models is:You are a mighty fine modeller tho, i cant do that lolz.