Need to know how to mirror polish bent brass and aluminum tube? This is a more complex process and we would advise that you contact AFS to discuss your polishing process in detail. The new Garboli MIRROR machines have been proven to work very well in polishing brass and aluminium tubes. Dependent on the original state of the metal the tube polishing normally begins at around 400 grit on the Garboli. The final stage is a liquid polish feed which is fed through a spray head onto the polishing belts. You can see the Garboli LPC machines here: LPC160 MIRROR, LPC300 MIRROR Please note: We have a much wider option of belts for the Garboli MIRROR machines than you can see on our website.