Having to reapply them every hour is a show stopper and gets tedious.
It would be also welcome to increase the duration to 4 hours.
I know at one time that is how they worked. Been a year + since they changed it. I agree, if it is not changed, then change the cost from dragon powder should be removed and something 1 tier below should be added in its place. Maybe 5 oil???
Oh yes, just do the maths:
Official Server -> Full clan = 10 members
Raid time = 6 hours
So 60 warpaints per day, which is 60 dragon powder. (given the fact nobody dies)