04-16-2020, 12:26 PM
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#11 (permalink)
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A True Z Fanatic
Join Date: Oct 2010
Location: Portage, MI
Posts: 2,304
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Quote:
Originally Posted by madwi
When you get good at sanding try your hand at finishing a plastic injection mold for clear plastic part like a headlight.  I never had the patience to sit there but the guys would sand with 220 and work up to a finish with Charmin toilet paper, and it had to be charmin.  |
I have a buddy that polished metal die sets for injection moulding. He said that the metal had to be absolutely mirror finish perfect and would spend weeks sanding to absurd high number using diamond paper. THAT would be terrible. He said that he would find flaws for some reason or another late in the process and need to kick the part back to milling. That meant starting over. 
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