What format is your footage?
What format is your final output?
I could possibly help if I can handle your format(s) and there aren't too many frames to retouch (as is often the case with effect shots).
Normally, you would output the shot as a TIFF sequence (a series of TIFF files) from AfterEffects and work on the frames in Photoshop.
If you need somebody else to do it, you would need to post the TIFF files on the web (http or ftp) so I can download them. Then I would ship them back to your public ftp directory or I can upload it to my own website and you would download from there.
After that, you would import the TIFFs back in AfterEffects (as a sequence) and edit the sequence into your project.
I'm sorry, but I don't know MOCHA too well (know it exists for AE, but that's about it).
The TIFF export route would create 240 to 300 separate TIFF image files (about1.5 MB each) for a 10 seconds shot. That's a lot of frames to retouch... Maybe the effects shot you need could be shorter?
If you own AfterEffects and Photoshop, rendering out your shot as a TIFF sequence would allow you to retouch the images individually in photoshop, then you could import them back as a TIFF sequence in AE and export them to FCX as a movie file. Then again, maybe FCX also allows TIFF sequence export and import, so you wouldn't need AE at all.
The clip is a retreating jib shot, from torso and trucking back, until it reaches a cross fade with the next clip.
I do need all of it.
The only thing I'm wondering is if it's possible to make the touchups look identical enough that there are no odd effects in color when played at full speed without using some sort of blending between the frames.