After the part is extracted from the bed of powder, the excess powder is brushed off using a soft brush, then blown off using a compressor.

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This is a five minute video of the University of Alberta's 3D Printer making some promotional coins similar to the ones at
http://www.ualberta.ca/CNS/RES EARCH/3DPrinter/ImageGallery/C oinColorDec2005/coins900x600.j pg

Please note that the AICT 3D printer is intended for the academic usage
by faculty and students of the University of Alberta.
Affiliates of other Canadian universities or government institutions
will be considered on a case-by-case basis.

http://www.ualberta.ca/AICT/3D PRINTER/index.html

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