The easiest way to do these suede jobs is to paint the car the same way you normally would, then topcoat with a "flat" clear. I think PPG makes one, or you can buy the flattening agent they have that is okay for use in clears. Not all flatteners will work. Some are transparent, but many of them will leave white specks in the clear.

I would not bet on that being pearl without seeing the car. The white areas could be caused by the way the flat finish reflects light. BTW, If you've ever sanded the clear on top of a pearl finish, you would know that it does produce an unusual "look". That could be a cool to use pearl under the flat clear.