... Broze polished aluminum extrusions ,aluminum profile 1.matte surface ,color clear 2.very smoothy ,can' ... aluminum extrusions : 6063 or 6061 2. Polish extrusions color : Silver, champagne, bronze, golden ,etc.3. ... track by colth wheels polishing Thirdly ,anodized with color .4. specialty of aluminum extrusions : surface ... . aluminum extrusions/extrusion ,bronze color ,matt surface ( machine polished )