Originally Posted by
SteveHOU
Another helpful tip is when you are flying on a code share, i.e. NW ticket/CO metal and in a CO terminal, go to a CO gate agent and get a boarding pass printed for your flight on CO stock, that will get you in the CO lounge with your Plat. I've used this with CO and NW quite successfully.
You shouldn't need to do this. If you are flying on CO metal and accessing a CO club then you are admitted. Period. The paper stock and flight number don't matter.