LOL... yes the "Boiler Suit" youre referring to is known as a Sidcot Suit (they came in white & kaki tan). They were issued to most pilots in 1940 and went over the normal service uniform like overalls. The average Hurricane and Spitfire pilot dislike them because they restricted their movement while flying in a tight cockpit (kind of flying short sheeted), but Douglas Bader used the sidcot all the time. I will be making a pilot with a Sidcot Suit as well but a little later.