dear brother
we are living in hot/dusty envoirnment which make white colour pale by the time of period but u can give protected shield to ur car skin to become pale by using quality brand waxes like turtle, mother, meguiar's which easily avilable in pakistan.
continues use of such quality brands gives protection from uv rays, oxcidation, road dust, brake dust, overall polution etc
i recommend you any quality car shampoo ( armorall wash and wax or mother wash and wax or turtle ice synthetic since ur car is new other wise turtle heavy duty shampoo good for older white paints ) meguiar's gold class wax and meguiar's nxt wax, use combo of these waxes will keep ur car skin fresh and whiter for the coming many years inshallha 
