like the one where you dilute the joint compound alittle and then roll on the diluted mud to the ceiling. Now its up there and you just do your thing with the trowel.
You need to experiment with the thinning of the mud so that you get enough to work with by not too thick as to fall down on you.
Over heads are difficult because of the gravity thing. If you want it thicker than the roller can apply, then apply one coat and let it dry overnight then apply another one.
Use a very very very thick roller cover for this job, the thicker the better.
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