yes you can repaint them mate, and no there is no special paint just normal spray can paint will do.
1st you need to either take the tyres off or cover the tyres, then rub down the wheels with wet and dry, then spray a undercoat colour, then once dried rub down again with finner wet and dry bit of paper, then maybe a 2nd unde coat, then repeat the rub down process, then put your final coat on, agai nrepeat the rub down process, then put another coat on and so on till al lthe primer is covered, then if you want a gloss finish you need to put laqour on them, and again rub down with even finer wet and dry, the laqour will make or break the finish so take your time with it, each wheel will prob need at least 2 coats of laqour.
or most spray shops will do it for you at around £50-70 per wheel