A .2mm shim does not exist. I'm not cutting up a beer can and using it as a shim on a track bike that worth almost $2,000. Not that you were suggesting that, but some will. That's a rigged up solution that eventually fails.

I can hear myself now, "Yeah, it's a handmade italian frame custom for a former Olympian and world record holder. It's got campy C-Record this, Supurbe Pro hubs, and...oh that? That's a beer can shim."