British Pre WW2 helmet help/advice needed

[Flying10uk]

That's my feeling...I really would like to see if it is a wardens helmet as that would explain the bits of white.

It is very hard not to take off the paint that you don't want to take off but remove the paint that you do want to remove. That is my experience with a number of helmets using a number of different paint removal methods. It sounds easy until you actually try doing it but you may have more luck than me.