I have straigikht hair, so I le to curl my hair, I know CHI products are really good and ideal for straightening hair to go with their other products. So since it is just a thermal hair protector, it'd be ok to use it to protect my hair against heat damage from the curling iron, right?

Also, what it, in your opionion the best hair spray? (Biolage, Big Sexy Hair, etc...)

Today I sprayed the chi 44iron guard throughout my hair and then curled my hair. After about a half hour, my hair started to uncurl. Am I suppose to wait a few minutes after I curl it to let it dry, apply it on wet hair, apply it after I curl my hair, or is it not meant for curling hair? Thanks!