My 550K3 top-end is off for blasting, my crankcase sides are polishing up nicely, but that leaves the crankcase at the front below the barrels which is pretty dull, covered in ribs, and either it's just totally tarnished or it has some sort of paint covering on it. It's covered in ribs and nooks and crannies so has anyone got a suggestion on the easiest way to get it looking good without spending months rubbing my fingers to the bone?