Very interesting to hear these comments on CA finishing. I stopped using it a long time ago. Found it messy and unpredictable and yes it cracks.
Melamine works great but have experimented with Friction Polish followed by Microcrystalline was and it works for me.
I apply two coats of Friction Polish with the Lathe stationary along the blank then two coats with the lathe spinning at high speed follow this with wax.
This gives a very durable result.