i did it with ,

extract surface and split non smooth part of surface and the edge too, then

rebuild the edge part change decrease high point count which make the surface no smooth, but the curve is slightly change with 0.0006 deviation ( my absolute tolerance is 0.001)

after sweep2 and join all surface back, i got naked edge at the part I try to solve the non smooth surface part,

can I ask, how is the right way to solve the non smooth surface? (because in mesh polygon has crack with it)

I confuse with rebuild function , it have change the curve slightly that make naked edge problem, how should I solve this non smooth surface please , thanks