Recently moved from MI to NC and noticed that finishers down here use A.P. mud for tape, bed, and finish coats. I prefer to only tape with A.P. and use Lightweight for all finish coats. I dont see why anyone would want to sand A.P. as it is a harder mud and when using box tools the edges and lap marks are unforgivable. Lightweight sands way easier and is lighter when holding a full pan. Other than not wanting to stock two different kinds of mud what other reasons would you want to use A.P. on finish coats.