thanks all, actually, the thing is very smooth and straight due
to being cut by machine, but the thing is there's a powdery
feel.
like if you use your hand to stroke it, you can feel very very
fine grains of wood (although un-seenable by the eye) on your
finger.
so, i think maybe spraying lacquer can fix this.
send for sand blasting, follow by plasma spray to coat it and then
use grinder to grind to perfection. If still hve that powdery
feeling, throw it away and buy a new one.
