Hi sirs,

I have a bit of a dilemma. Let me tell you a quick story.
I park my car near my office area. Just along the parking lot, a new building is being erected and falling debris from the ongoing construction can not be controlled easily.
Here's the dilemma...
I recently noticed that the exterior of my car developed these "white spots." I thought it was just normal dust and dirt that you tend to accumulate because of daily driving. When I finally had time to take my car to the car wash, the attendant who worked on my car said "hindi kaya ng hugas ung puti puti sir! mukhang natuyong semento na eh." I was not able to think of any other means that I got those spots other than the construction near my usual parking area. Anyway, I need some advice on how to have those "cement spots" removed. Is there a safe way to do so where the paint won't be significantly affected? What's the best cleaning solution to use? Is there a procedure I need to follow?

Any feedback that you guys may have is going to be appreciated.

Thanks! :D