  We show that any finite triangulation of the real projective plane or the
dunce hat is partitionable. To prove this, we introduce simple yet useful
gluing tools that allow us to reduce partitionability of a given complex to
that of smaller constituent relative subcomplexes such as the disk or the open
M\"obius strip. The gluing process generates partitioning schemes with a
distinctive shelling/constructible flavor. We also give a tool to lift
partitionability of relative simplicial complexes to that of the preimages of
certain simplicial quotient maps.
