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Old 03-11-2019, 02:55 AM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,167
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If foam sculpting isn?t your forte and you have CAD skills and a 3D printer (or access to them) it?s possible to 3D print the ?plugs? with PLA. After fiberglassing, you warm the the part in the oven to 150F for an hour and it becomes soft enough to pull out.

Details here: http://elder.ninja/blog/p/7512
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