Care to be a bit more specific?
What is a "coro statue" for starters?
If you are talking something like pasting a photo of a person on coro and then
cutting an outline to make it look like s/he were standing there in-person
then a one-up job would be cut with a razor knife (it's a skill). More than one
or two was usually done via a die cutting press back in the 'old days.'
That was true whether the backing sheet was cardboard, foam or plastic.
For hand-work, it probably would be best to use a rigid template that you overlay
and trace/cut around.
Actual routing has to be done at low speed/speed to keep the coro from melting.
That's all I really know about routing polypropylene.