[Woodcarver] Wooden nail polish caps

[Rick Johnson]

In my other life, I went to a technical high school for Machining...I 
was going to be a tool and die guy (until I discovered computers) and I 
have cut any number of threads over my career there. The best way to go 
would be to incorporate the plastic caps. There are several potential 
problems with wooden threads:
1) expansion of the wood - can be alleviated by making the threads 
"loose", but that causes the material inside to leak out and then dry out
2) wood is fibrous, so the threads have to be coarse or they will easily 
break...but same thing, the material inside would likely leak and dry out
3) adhesion with the material inside the bottles, they may get "stuck"
4) absorption of the liquid part of the material in the bottles, since 
wood is porous.

Just a  few thoughts...
If you make the cap in such a way as to utilize the original plastic 
caps, you could do some very fancy carving or whatever on the top and 
not worry about the threads...

Just thinking of reproducibility and efficiency and I hope this helps.

Rick
http://picasaweb.google.com/n1wgkpics