Peroxide biprop ignition

Some methods I've seen mentioned for peroxide biprop ignition a

Decompose the peroxide with catalyst pack.
Pyrotechnic igniter in the chamber.
Dissolve catalyst in fuel.
Hypergolic starting slug in fuel feed line.

How about mixing some liquid catalyst into the peroxide feed for a few
seconds until there is stable self-sustaining combustion in the
chamber? Liquid catalysts for monoprops have been abandoned in favor
of catalyst packs for good reasons but they seem to have some
desirable properties for biprop ignition:

Usable with high concentration peroxide.
Can be used with strongly stabilized peroxide.
No hazardous materials.
Restartable and reusable.

The catalyst is mixed into the peroxide just before injection into the
chamber. This cannot be done safely with a fuel but catalytic
decomposition is slow enought to give some time for mixing. The
injector is optimized for operation with uncatalysed peroxide. It may
not perform optimally with the mixed-phase decomposing peroxide; it
just needs to be good enough for the ignition phase. The injector and
mixing chamber are flushed of any residues by ample amounts of
peroxide (except on some emergency shutdowns) so the catalyst should
not contaminate the upstream oxidizer lines .

Oren