I know several females who do mechanical work of one variety or another, I work with some every day. Invariably, they do NOT wear stereotypical female clothing when doing so! One exception though - a very cute female computer engineer several years ago who preferred wearing skirts / dresses when making site visits. She kept a very stylish jumpsuit in her kit for any occasion when any heavy work was required! But she was the exception that proved the rule!
As for your original premise... No I wouldn't crossdress full-time. For me, crossdressing is a contrast to / escape from the 'everyday'. So, while I'd enjoy the freedom of being able to crossdress whenever and wherever I liked, once the initial pink fog had dissipated I crossdress when I felt like it but not otherwise.