A few nice precision China milling China machined parts images I found:
Vice Re-furbishment
Image by tudedude
All the parts are de-burred and the faces cleaned with a fine cut file to remove high spots.
Take care to lighty chamfer all the sharp edges to remove any metal that might spoil the re-build.
Vice Re-furbishment
Image by tudedude
The vice cleaned of all oil and grease removed – then the parts sprayed with silicone lubricant and re-assembled.