Anyone use cork to make crainkbaits or poppers or swimbaits or frogs???

I don't think cork would be durable enough to make lures out of.  

But you might be able to do it with a wire through and a hard topcoat.  It would probably be really hard to seal also.

You can use cork but from what I've read very hard to carve and finish.  Try balsa foam if you looking for something other than wood.  It's more expensive that balsa wood and makes one heck of a mess when sanding.  I made a couple of baits with and I don't like it, but I love balsa wood.