signing your public key, how?

[zentara]

Hi,

I've read somewhere in the docs to sign your public key.
Where in the process do you sign it?

Do I export my public key with ascii armor, then sign the ascii
file, then give that out as my public key?

Or do I use the edit-key function and sign my key
while it is in my pubring.gpg, then export it with
armor?

Does it make a difference?