Friday, November 14, 2025

Polishing Carbon Fiber Composite

 I saw a very well-done video on polishing CFC.  He was doing a bicycle frame and my, what an improvement!  I tried the technique he showed.  The results were disappointing until I remembered something I learned making telescope mirrors: polishing requires a pretty smooth finish.  His bicycle frame was probably nicely finished at the factory.  When I ran some #60, #320, #600, and #5000 over the surface, polishing with Mother's Mag Wheel Polish produced a nice finish.  This is something so laborious that I think I will only do this to bare plates before machining.  

I need to replace the belt and face sander sheets first to get down through #320, then hand power sander for #600.  Hand sanding #5000 is not bad.  Polishing I did by putting the polishing tool in the drill press, holding pieces in vise and lowering it down to the surface.

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