It's come up again - I have a drywall patch to do, and I need to get it done in about 18 hours. Normally I use premixed drying compound, and just wait 3 days for 3 coats to dry.
If I need to do something faster, I'll use a setting compound for the first coat or two. I don't do big production work, but I do take pride in how smooth the finished product is, and that means some sanding. I try to sand less, and finish smooth more, but still, I'll be doing some sanding.
So how can you get this done in a day? Even though setting compound sets up firm, you still can't sand it because it's still damp. Is there some secret I'm missing? For a tiny job you could dry it with a hair dryer or something, but for a whole wall, even fans take awhile.