I painted a bike tank with a pretty wild orange pearl that came out great, it was easy. The pearl was in the base coat and it wasn't hard to keep mixed, although I didn't have to do a large area. Pearl is a bunch easier because the flakes are really small and stay suspended in the paint for a long time. The older types of flake don't do this so well.
I don't think you want to be putting flakes in the clear coat, it will interfere with final buffing as it rips the flakes out of the pores of the paint.
Last edited by 4ontheFloor; 04/16/2008 8:22 AM.