Hi
The mask was MDF contaminated, and until I started to clean it, I was surprised at the level of the MDF fibers and where they lodges on the external surface of the mask. When I took the mask off outside of the workshop, I must have contaminated the inside with residue fibers on my hands.
Learning outcomes:
Improve extraction and capture work debris, dust at source ( I have just purchased a NVD750 extractor from Axminster and its the dogs danglies);
Restrict or better still eliminate the use or machining of MDF in workshop;
Murphy's law is alive and well and residing in all our workshops;
Regards
Aden