I have done the marble effect on a J-Concept Raptor with Pearl Blue backed by Sky blue and it turned out really good. My next project is going to be a sugar free Monster Energy body (seeing that I'm type 1 diabetic) and i want to do a black and blue marble. My question is can i get away with backing the black in the marble with the sky blue to match the decals or do i have to use the pearl blue (the darker color) for the effect to work? Thanks in advance guys!