I have a friend that does some of mine for me. She wraps them in big towel and then gets on her knees and puts the kids between her legs, as if she was sitting on them. She puts another towel or burlap bag over her legs so she doesn't get burned. She will burn one side, ice it and then burn the other and ice it. Then she sprays with AluShield.
She uses a Rhinehart 30 iron with a 1/2 tip. If you have to use an extension cord make sure it is a 12 gauge. I have been told, and no proof, that a smaller gauge cord will not allow the iron to get hot enough. We do them with a 12 gauge cord and no problems.
I have to do 4 tomorrow as well.

I use a box.