I have had good luck with wire removal effect, just do a raw track first and connect the two effect points to the track with, and set the width to be as wide as your area to erase.
it will pull in pixels from around the area you want to erase.
then some roto on the arm and a new shadow made from a solid should do the trick
I mostly use Mocha AE to track in clean plates from photoshop and it works great.
Mocha Pro has a remove module that does magic.If you have the budget, it works great.Â
If you have not learned Mocha AE yet, take an hour and do a tutorial or two.
You will be happy you did. It really is that special.
patrick siemer