Particles can be transported by vibrations due to launch, (attitude control) manoeuvring and docking. Pyrotechnic shocks can cause particles to migrate from one surface to another.
Particles can be charged due to their interaction with ambient plasma or photo emission, and subsequently attracted by electrically charged surfaces.
For specific missions other mechanisms can have an effect on the particles, such as: drag, due to the residual atmosphere in the lowest Earth orbits; radiation pressure due to solar radiation; gravitational tide, e.g. reattraction to spacecraft.