I'll use a hacksaw to cut open the can so the contents can be removed.

The internal capacitors are potted with a tar-like material that will need to be
heated up to loosen it enough to pull out the guts. A screw is inserted so the heated
piece can be removed.

A few passes of a propane torch melts the potting compound.

And out it comes.

The remaining piece in the can base gets heated and removed.
A quick de-burring of the can with a file smooths the edges.