I have found Tools->Expand <Prefabrication> (sorry for translation but I have national language in SE).
Is there another ways to do this?
For some reason it seem that the thicknes of that model is not uniform.
I have copied the top surface, removed the original body, applied a thicknes of 0.38 mm and then been able to use the "transform in synchronous sheetmetal" tool sucessfully.
Here a video: