Just a bit of useless info,the priority of the ritualstic cleaning of these
perspex canopies can't be expressed too much.
Apparently the perspex material could be scratched so easily,so much so,that the ground crews were given the softest cloths to clean them with ,as even wiping them unwittingly with a handkerchief could damage them.
After all you're life depended on the effeciency of you're search tfor the enemy through you're canopy.
(An exert from Spitfire at War by Alfred Price)
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