Start with the grit that will remove all imperfections , make sure the surface is uniform then move to the next grit and then the next etc .
These are dx pedals that a guy on a vintage bmx forum polished
Same bolt
People seem to say polished when they are really just cleaning the surface ; do you want polished or just shiny ?
These are dx pedals that a guy on a vintage bmx forum polished


Same bolt


People seem to say polished when they are really just cleaning the surface ; do you want polished or just shiny ?