turbo,
there is really no set standard on ratio with pearls.
Its really one of those things where you have to mix-spray a coat on a practice panel, let dry look at it out side to see if its the desired effect you are looking for.
There is a happy medium , as to much pearl will look muddy and very ameturish !
Some Pearls no matter the color will start turning the clear yellow after 4 or more coats of pearl.
another thing is you need to make sure the clear w/pearl is stirred or shaken real well as it has a tendency to clod or clump together and will spray out in tiny chunks and look like dirt, and you will have to start over.
SprayTech