Holly Terror block with black on one side and blue with holes on the other is good and Dura-Block makes nice ones. Like they said, get a soft one for corners, edges, and curves, a palm sized one that is med/hard and then a bigger one for big straight panels that is hard to keep it straight and smooth. If orange peel is too much then you can start with 800 and then finish with 1200 or 1500. Try to finish with the finest paper possible to help keep buffing time down.