Hi there
I imagine that your daughter has had her winter dance now, but Yes i always do my arms. I have done since i was about 14.
The hair on my arms isnt that dark but personally i always just feel it looks better.
I normally just shave them, its much less hassle and unlike when you shave your legs as your arms feel quiet smooth unlike shaved legs
Ive also used immac and nads before to do my arms, but find it too much hassle, far too messy.
Also, I dont find that the hairs grows back any darker. I know its a bit late but may help in the future.
Happy new year