Here's a nifty little tool that you can knock up quickly with an M8 bolt and nut to buff up your drip tips
Place the nut onto the bolt and tighten it down as far as it will go, and then place the threaded section of the bolt into your drills chuck.
Whilst the bolt is spinning around in your makeshift lathe, get a file and chamfer the one side of the nut as per the pics below.
When done, remove the nut, and repeat the exercise with the inside face of the bolt as per the pic below.
Now pop a drip tip, onto the bolt, tighten it in place with the chamfered nut, (which will automatically center the tip)
Reinsert the bolt, drip tip and nut into the drill chuck, and get a clean rag and some fine buffing compound ready ... and off ya go ... not too fast, as you want frictional heat at a minimum!
Optionally ... you can reduce the diameter of the bolt head as well, which would allow you to polish the inside edge of a drip tip too.
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