GPG - PGP - Ahhh *PLEASE HELP - HAIR ALMOST GONE*

I've been trying to use bitcoin-otc

I followed the below instructions found @ https://bitcointalk.org/index.php?topic=138764.0

Quote from: XarRos on March 30, 2013, 09:32:55 AM

Quote from: John (John K.) on January 25, 2013, 07:53:37 AM

6) Gribble will spit back a http:// url. Copy that and run (if you're using commandline):
wget -O - http://bitcoin-otc.com/otps/46ED38A2A668A578 | gpg --decrypt

Thanks for your instructions. They got me to this step. I am on a mac. I've used GPG Keychain access to generate the keys.

I've tried to decrypt using terminal with the method above as well as using gpg --decrypt

both methods return the error "No Secret Key".

So where do I input my secret key into this step?

Thanks for your help.

The above is my question.

I have now tried several methods, including the above, and:

Quote from: TheButterZone on March 30, 2013, 10:09:52 AM

curl http://bitcoin-otc.com/otps/YOURGPGKEYIDGOESHERE | gpg -d | pbcopy

Mac^

I'm obviously missing something. How do I decrypt this? How do I give it my secret key, and prevent this error?

I know this is probably a very silly question but I've been stuck here for over a day now.

ANY HELP is massively appreciated. Thanks.