Here is how I spent part of my morning. I have been wanting to turn a duck call from a piece of clear acrylic for a while and finally got around to it. It has a modified Echo poly insert.
Finishing the inside is the most time consuming part of making the call. I drill the blank on the lathe. While it is still mounted in the chuck, I use a 8" or so piece of 1/2" delrin with a slit cut in it to hold sand paper and wet sand the inside from 220-1000 grit. I then use the delrin to hold pieces of paper towel and polish the inside with Novus 2, 3, and HUT plastic polish.
That is neat![] My high schoolwwodwork teacher used to tell of how they polish Perspex (acrylic?) with jewellers' rouge to get a really high gloss finish.
Nice polish there!
Are you modifying the tone board, or the reed?
I'm gearing up for calls myself. I'm definitely moving up to Echo inserts next, and may even get a public jig and try the toneboards... I'm not the serious kind of call turner! (gotta be careful with that "custom call maker" phrase)