Coating of aluminium rims

Hello together I have to paint my aluminium rims (SAT 10/18 inches) myself, but first I need some tips and tricks. The aluminium rims have some parking damage, which you have to grind, spatling I do not come into the question. I will need the following: – sandpaper – rim paint in black – clear varnish – filler – thinning (clean the rims) My question is, should I take the paint out of the spray can or rather paint with gun and pressure air, with which method I get the best result? Which varnish and clear varnish should I take, is there something special for the aluminium ? Does anyone know any offer for the varnishes ? the wheel caps are made of plastic there is something to consider here (lacquer normal or special) Thanks to all in advance