Finishing

Polished Finish

Our polished parts can be made to your specification. Otherwise we offer two levels of polishing:

Basic Polish: Very similar to a mirror polish finish, however, polishing marks may be slightly visible. Use this process when visual requirements call for a mirror finish on surfaces viewed indirectly. Mirror Polish: This is the highest level of mirror polishing that is achievable and therefore also the most labor/time intensive. Use this process when visual requirements call for a mirror finish on surfaces viewed directly. Custom Polish: On request we can also provide custom polishing per your specifications. For example, a customer might request a partial ‘high polish’ on a sample part or on a section of a full piece, to get a sense of what that piece would look like if the polish were carried out to completion. In this case we polish up to #1000 grit.

Please contact us today to find out more about the options of polishing.

Sanding of parts is done by hand or with the help of hand tools. Unless specified otherwise, we offer to finish your parts based on our three internally defined finishing levels.

 

Aluminium

 

After machining to a super fine machine finish, the metal material is carefully sanded with progressively finer grits up to #1000. We utilize Alu-Oxide abrasive and then carefully polish by hand and/or using a 3M® polishing hand-tool.

 

PMMA Material

After machining to a super fine machine finish the material is carefully sanded up to 1500 Grit using Alu Oxide abrasive. Afterwards it is carefully polished by hand and/or machine.

PMMA is a UV stable material, with strong similarities to glass with respect to clarity. In comparison with Poly Carbonate (below) the PMMA material does have a higher resistance to vibration and scratching. On the downside it is less impact resistant than Poly Carbonate.

Polycarbonate (PC)

After machining to a super fine machine finish. material is carefully sanded up to 1500 Grit and then vapor polished using Weldon 4 gas. You can watch how a part is vapor polished here.

This method of polishing is frequently used to return clear materials to an optical quality finish after machining. Vapor polishing works well in the internal features of components. Polycarbonate is great to use in situations where high temperatures are present. We have dedicated another separated page explaining vapor polishing.

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