Why is his work so smooth?

Each and every one of those holes recessing when dry and needing another coat, and, perhaps, even one more. Of course, those who don't know, will not suspect anything.

Under filled when dry - waste of time

👌👌

karna dia sudah terbiasa

belajar, praktek, belajar, praktek

Consistency of plaster and >10,000 hours practice.

Because he hates sanding!

Appropriate mix consistency

That's what he does for a living?

Very smooth work