CAD tip # 12771:

You can use it to protect your model (intellectual property), to remove all modeling features and history, for publishing/handover of just a simplified 3D geometry, a dumb "shrinkwrap" outside your company.

First subtract the 3D assembly for an auxiliary wrapping volume. The fill the void using the function "Boundary fill" with a new solid and save it as a separate component. Alternatively, you can directly use the Intersection operation instead of Subtract.