I grind the wheels using my old mini drill. This little machine serves me for more than 30 years now. I got it from an Uncle (this kind of uncle that is no relative, but a close friend of my parents) when I was a teenager and wanted to build electronic circuits. For grinding, I use grid 100 to give the wheel its shape and grid 1000 to smoothen the surface.
I paint them black and add the rims using grey construction paper (is this the correct translation for 'Tonpapier'?).
Now the second wing.
As the first one did not come out as hoped, I used a different technique. I shaped the leading edge with a bonefolder. Then I glue the skin to the skeleton (sound sooky). When trie, I glue the leading edge with cyanoacrylate glue to the tip of each rib.
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As I am not a native English speaker, I am happy about every error you find and point out. There's always room for improvements.
All my Models can be seen
here.