How to (and how not to!) remove machining toolmarks from a CNC machined aluminum box. Conclusion: sanding works great on flush surfaces, but recessed panels proved harder!
3M 60 Grit (really nice!): https://amzn.to/1Ojq93H
Scotchbrite Industrial Pads: https://amzn.to/1T64YGJ
Sandblasting: Aluminum Oxide 120 Grit: https://amzn.to/1rIaypx
Sandblasting: Glass Bead: https://amzn.to/1T653dt
Beatty Robotics: https://beatty-robotics.com/
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Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.