I'm going to leave the whole sexualization topic alone because I agree with Shlup and have little to add there.

But as someone who spends his afternoons at school in the shop learning automotive service and working on cars/welding/using oxyacetylene torches, there would be very little sexual about her wearing clothes like those while working. Largely because her skin would be permanently stained from some pretty toxic chemicals getting on and absorbing through her skin on a daily basis, and shed be covered with plenty of burns, cuts, and bruises because she's not dressed to protect herself from the dangers inherent in her work. About the only believable part of her outfit is the goggles she has around her neck. If it weren't for those shed have no eyes either.