Brushed Aluminum finish for Double tanks?

[Moonglow]

Experienced divers prefer unpainted aluminum cylinders because unpainted cylinders better resist corrosion and retain their appearance with heavy use. We offer the brushed no-coat factory finish on our aluminum cylinders.

• "Clear" is a shiny clear coating with poor durability and is often confused with unpainted finishes.
• "Brushed No-Coat" is a smooth bright unpainted finish that retains it's appearance with heavy use. 'BNC' costs more than other finishes.
• "Shot-Blast" is a textured matte unpainted finish, decals do not adhere well to shot-blast.

http://www.divegearexpress.com/gas/aluminum.shtml

You're welcome.

 

[eelnoraa]

My pick is also brush with no coat too.