Should I brush them or polish to mirror finish? 
Originally shared by Jarek SzczepaĆski
Top & bottom plates for #openrc truggy! (before cleaning and polishing) Have to speed up with printed parts! 
Those are really cool- Mirror finish is my vote!
Would you mind sharing the .dwg/.dxf you used to have them cut?
@Alex_Fielder I posted all details few days ago - https://plus.google.com/106870725148865771636/posts/YPmKDL66C5L
Ah! Sorry @Jarek_Szczepanski I did see that post. Thanks again, they look great- did you have two sets made to save on costs?
nope, price was fixed (and extremely low 
). I made second set for @Szymon_Kobalczyk 
Brushed (or anodized)! A mirror finish will look really ugly after just a few runs.