If you set up a Fifi hook like shown in the photo below, you can attach yourself to the cord coming from its bottom with a Munter, secured with a Mule while you are cutting the tat off the fixed gear. The line coming from the top of the Fifi is a little bit longer and it is attached to your harness with a knot and a biner.
Once you’re done cleaning the tat, pop the Mule and lower yourself out (my cord is about 12 feet long) till you slide off the end of the cord. The cord attached to the top of the Fifi will pull it off the piece and the whole rig will end up dangling from your harness.

Easy, fast and safe.

Easy, Fast and Safe. Submitted By: Mark Hudon on Aug 24, 2012

Mark, you are a fountain of big wall trickery. I learn from every post of yours. I can't say that about anyone else's dreck, not even my own.

Pretty inspiring stuff you've been putting out. Keep up the good work, brother. Thanks for the effort to put stuff like this out there.

Mark, Thanks (again) for the tips. It is a valuable service you are doing and many of us appreciate it.

Hope you send Lost in America in the finest style.

Many thanks.

I just figured out a way to do this without the lower out cord or a long catch cord. Hold on a sec, I have to go test it out....

oops, no, can't do it.

I thought that you could attach a cord to the top of the fifi and then to the rope with a Klemhiest knot. Once you were done lowering out, I thought you could pull the rope and pop the fifi off the piece. You can't do this because the rope is actively running through the loop or biner on the fifi for your lower out, it's not static like you would need for the Klemhiest.

You don't need the pull cord if you are willing to untie from the rope and tie the end to the top of the Fifi, you could then lower out as far as you want and then pull the fifi off. You would be still be attached to the rope with your jugs AND your back up knot.