question: Cast-iron and steel surfaces are susceptible to becoming what on the surface?
choices.text: hardness solid irritants acids orange heat Unsafe damaging
choices.label: A B C D E F G H
fact2: Cast-iron and steel surfaces are susceptible to corrosion in the form of rust.
combinedfact: Cast-iron and steel surfaces are susceptible to becoming orange on the surface
formatted_question: Cast-iron and steel surfaces are susceptible to becoming what on the surface? (A) hardness (B) solid (C) irritants (D) acids (E) orange (F) heat (G) Unsafe (H) damaging