Buy a pair of the cheap black work boots at walmart.. Polish the crap out of them, and you will be fine.. Be warned that on monday, NO ONE is acceptable, tuesday, you will be told it is "better" and Wednesday they will be "much better". The instructors have to make you believe you are improving, even if it was correct the first day..
To get the shine they want, polish them LIGHTLY, the less polish, the better.. Brush the dried polish off, then spit on the toe, and use a soft cloth to buff them...