Jorgen Escher has written a FCP plug-in that will reduce the micro-moire found in some HDSLR footage. This will not solve all moiré problems, but may help you clean things up a bit. The video demo has no sound and is quite short. Here is a rip from his site.
“This FCP plugin battles the disturbing problem of micro-moire. Micro-moire manifests itself as red/blue color streaks and pixels that appear in natural and irregular patterns, such as hair, water and grass. Micro-moire is seldom visible on the camera’s LCD display and sometimes not even on a 7″ external monitor. Many a good shot has been spoiled. Get them off the shelf and run them through this new filter!”
Source: Philip Bloom