We are The Virtual Foundry. We make highly infused metal 3d printing filaments called Filamet™ Filamet™ averages greater than 90% pure metal by mass. If you do a little sanding and polishing on your Filamet™ prints the microscopic plastic layer covering the metals is removed. What remains is a pure metal surface. As a result, your prints will behave, cosmetically, exactly like the metals they are infused with. They will Patina and Oxidize to an authentic metal finish. Furthermore, if you are truly ecstatic about your new print, it can be SINTERED. This is a post-processing method that removes the binder entirely and welds the metal particles together to create a PURE METAL PRINT.