its mold, nissan white is "integrated clear" which is a fancy term for single stage. there is no clear therefore if left unprotected, morning dew and rain will just settle into the paint and eventually mold. you can clay but most likely it wont remove it cause the mold is actually soaked into the pores of the paint. buffing will reduce if not completely remove it, but becareful who does it. a hard buff on old single stage and you will start seeing primer on all your edges. and obvioulsy wetsanding will increase your chances of this happening. do your homework on who you choose to do it and dont be afraid to spend a lil money. guys like Presidential Detail and myself charge the kinda money we do cause true detail is skill and takes time, dont be misled by hacks at a carwash. if you do youll find yourself at a body shop paying them to paint it when you should have just bit the bullet and let someone who knows what they are doing work on your car. good luck and i hope this helps