 
How are you able to polish them so well and in such tight areas like around the sensor housing? My method was dremeling the pipes with the sandpaper bits from the generic kits available. I believe they're like 80 grit or so. I then use a 400 wetsand paper and sand by hand following with 600, 1000, 1500, and 2000 grit but I can't get it as nice in the tight corners. It seems like they've used a drill the hole time and wondered where you can find higher grit bits. Thanks
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