I forgot to add, if time displacement cannont find a clean frame, you can also use bend in conjunction with cc wire removal.
as an example, open the effects control of the project file and enable the last 4 plugins, the curved blue hair will magically disappear from the background. cc bender unwraps the curve then cc wire removes it and finally picture is un-bended. The mocha b-spline can then act as a mask because stretching causes a little softening. Also, in this special case, a rough mask might work too.
cc wire unwrap example
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