The best way to do such transitions is as follows:

Sharpen your skew.

Position your toolrest AT the centerline (height-wise).

With the spindle turning at medium speed, place the skew on the
toolrest long point down and with the shaft parallel to the ground.
The width of the shaft should be nearly vertical; i.e. the short point
is at the top and the long point at the bottom. You may need to tilt
the skew towards the wood SLIGHTLY so that the cutting edge is aligned
with the wood's motion.

Align the bevel of the skew with the contour you want to cut and
present the edge to the wood. Keep the shaft parallel to the ground
as you make the cut. This cut is a highly angled slicing cut made
with the long point, and minimizes splintering.

Note that the technique is similar to v-grooves and facing end grain,
except that the skew is kept parallel to the ground rather than being
levered in.

As you approach the final cut, increase RPMs, take lighter cuts, and
move slower.

To sand, use a long sanding block, holding both ends and presenting
the middle to the cut edge.