paint oo not chalky again

hey guys im thinking of painting me series 3 lwb in nato black satin but i dont want it 2 go chalky, i wanna spray it my self as thats cheaper what paint do you reckon thats cheap i can spray on that wont go chalky or do you think i can put something on it, to stop it going chalky and looking crap, preferably black or dark blue well somthing smart but hard wearing thanks guys what colors have you seen that look good

easy and cost efective thing to use is laquer and you can buy it in mat,saturn, and gloss

what could i spray that on and not need a spray booth and a bake aswell