Currently, we can't think of a way to accomplish our goal (removal of the externally controlled/stored artifacts at the same time QuickBuild removes the build that created them) without taking over all the archiving/build deletion for the entire system.
This is a request to provide a "hook" (integration point) where we could run some Groovy code during QuickBuild's built-in build archive/deletion mechanism.
I've submitted a feature request.
http://track.pmease.com/browse/QB-1805
Thank you,
Scott