This is exactly what I was afraid of.  I spent hours stripping and sanding.  I hesitated staining because I was unsure how it would look.  It is a blotchy, swirly mess.

This is the trim in the back hall leading to the basement.  I started with this trim rather than something in the middle of living area.

I can see my standing marks, there may be some residual shellac or paint left.  I am so frustrated.  I will address this another time.