There are many ways to post process a really cool metal print. You can do it by hand, with a tumbler, etc. Some great articles have been written so far about post-processing materials like bronzeFill, copperFill, brassFill & steelFill:


Polishing with some basic DYI-tools 

https://learn.colorfabb.com/post-processing-gcreates-rocket-ship/

https://learn.colorfabb.com/teapot/


3Dhubs Talk on creating a Patina finish 

https://www.3dhubs.com/talk/thread/bronzefill-patina-processing


Two articles by the Lulzbot team

https://www.lulzbot.com/learn/tutorials/accelerated-aging-your-metal-bearing-3d-prints

https://www.lulzbot.com/learn/tutorials/polishing-your-metal-bearing-3d-prints


One excellent blog by Nick Lievendag

http://nicklievendag.com/colorfabb-bronzefill-review/


Tony Short's colorFabb gift box and how he made it

https://learn.colorfabb.com/colorfabb-gift-box/


Adafruit's instructional video


Some interesting blog posts about prints not made by us (we did write the blogs, which is the easy job):

Ancient Greek Helmet by Andreas Mielonen: https://learn.colorfabb.com/helmet/

Fountain Pen by Rein van der Mast: https://learn.colorfabb.com/fountain-pen/

Huuuge Octolamp by Esteban Pacheco: https://learn.colorfabb.com/octolamp/