Wow thanks for all the suggestions guys....... I guess I should have explained the situation and reason for doing this in my original post. The crankshaft only has about 1000 kilometers on it (pistons detonated) and all journals look fine I was just wanting to remove the "stain" left on them from the bearings. I will be mic'ing each journal to verify the measurements but with that little usage and visual appeal being good I am assuming I won't find anything out of the ordinary. I just wanted to "shine them up" before I rebuild this engine, I wasn't hoping on removing much (if any) material. I know at work when we rebuild transmissions and reuse certain components such as main shafts and turbine shafts, all we do to polish them is soak them in WD40 and take scotch brite pads and wrap and rub
. The surfaces turn out looking like they're chrome plated but I am not so sure if this is a good idea on a crankshaft. I did read somewhere that an old leather belt works wonders to just do a basic polish which is all I really need, would you recommend trying that first?