Wash out Nomex
Just interested to find out where your info on Nomex "washing out of flying suits" comes from?
Do you think everytime an RAF aircrew mate washes his flying suit he has to "reproof" it? With the amount of curry/beer/sweat and pepper sauce that these things get covered in...I can assure you that they are washed fairly frequently and are not "reproofed". CW jackets require reproofing to keep them wter repellent (ish)
Nomex is what the material of the suit is constructed of, not "proofed" with. All the thread that is used on flying suits by SE fitters (repairs and attaching velcro for badges etc) is Nomex thread.
Even after Persil treatment at 50 degrees, your RAF Flying suit will still have the same retardant properties as before. As with all fibres, this will degrade with AGE, not whizzing around your Bendix 9000 super wash!
Reichman- just read your profile and am quite surprised to read your occupation. Many of your colleagues have expressed their surprise that any RAF aircrew still believe this myth!
Do you know that you are putting your squippers in a difficult situation by wearing flying clothing that has not been serviced or authorised for wear by your sqn?
PS Your colleagues (and squippers) must be blind if they cant tell the difference between an NATO suit and a Mk14 or 16!