how do i wash /or wax my car to get a nice show car shine?
 

everytime i wash my car its nice and clean and shinny but few days later it collects dust and look a dirty and dusty
its black btw

is there a way to prevent that?

Yeah buy a silver car next time. You bought a black car, that is the worst color to keep clean and the hardest color to get clean.

lol its called "normal", happens to everyone, you can prevent the dust by...washing it again...before it gets dusty :)

Here's an answer if your willing to do it. You can quick detail your car daily or just use the california car duster(don't drag it on, but lightly dust it) to prevent the dust from baking on to the finish due to moisture in the air. I have a silver car also, but as with any car, you still have to maintain it no matter what. My advice, buy that duster and take 5 min at the end of the day to dust it off to keep it clean and do regular washings weekly or biweekly. Hope this helps.

silver car also?? he said he had a black one lol

^ weird...