How do I clean the Piston?

You can polish the outside of your Piston using a lint free cloth and a metal polish. This will bring back its shiny lustre, and have your Piston looking brand new. Do not use any polish or abrasives on the inside of the housing or the pin. This will cause damage to your Piston. 

Avoid getting the Piston wet or dirty. If any of the grooves gather debris you can remove this with a dry paintbrush or unused toothbrush.