I'm sorry I don't know any details about how repairs have been carried out on our blades, but our MRO is a large outfit that definitely knows how to handle composites. Most of our issues were cracks rather than chips, and so I believe much of the repair work had to be carried out by MT themselves, or at least under their guidance, hence the lengthy delays due to their very small presence in Australia.
The aircraft's a light twin used for IFR training.