Curling wax\pressing cream is very heavy. It seems like it would be very difficult to wash out without really stripping your hair. Never did it but those are my observations.
I dont use curling wax/pressing cream however i have tried Glam Traxx from Giovanni to help slick buns and ponytails down (it works really good on the bun portion). Its a great alternative that washes out a little easier. Glam traxx is like a styling wax that comes in that deordarant stick looking thingie. Here's a link: https://www.internatural.com/ingr/ingr134244.cfm