I hope this is the right thread. How do guys who play in one guitarist bands play two guitar harmonies live?
a harmonizer pedal
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Honesty is the best policy!

...Unless your trying to get a job. In which case, lie like you just got pulled over with a dead body and some shovels in the back seat.

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Back up guitarist. You can hire them and they will tour with you and only play what you tell them.
Albums usually have more than 1 guitar track recorded. Meaning that bands have live versions of the songs.

If you've ever listened to War Pigs, there's 3 guitars during one of the solos, but Tony Iommi plays a combination of all 3.

Or like what red said, they hire another guitarist. And they're usually back-stage.
You don't. If you have one guitarist, but record two on the album, you're still only playing one live. Unless of course, back up guitarist.
Loop pedal?
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