I have a 3-month-old sportivo (blazing gray) and since its our first ever brand new car I want to give the best care that i can to my car.

situation: i live outside the city proper where i drive about 10 km from house to work with 1.5km dusty/uncemented road. and when i say dusty, its really dusty! its so dusty that by the time i get to work (after 3 hours of washing and cleaning), the car accumulated enough dust to write my name on. at workplace, it is park under the scorching heat of the sun.

i've waxed the car twice pa lang since we bought it. and i try to wash or have it washed at least twice a week.

question:
1.what maintenance can i give "steve" (my sportivo's name)?
i've read one thread here about micro-scarring when dry wiping the car. 2.how can i avoid this given my situation?
3.how about micro fiber duster? can i use this thing to wipe away the dust without micro scarring the car?
4. what product can i use to give my steve the best protection that he can get against dust and sun? i just bought zymol cleaner wax + detail. is this good enough?

your suggestions will greathly help!