Shelling a closed surface

Hello I am new to Rhino and modeling software. I created a closed polysurface, a flower vase. It was built with a 2mm wall. I decided to scale it up 200 percent which increased the wall thickness to 4mm which it turns out is too thick to print in reasonable time. Does anyone know is it possible to thin the wall without starting over.

No one knows. It’s not possible. Perhaps if your vase consists of three surfaces (inside, outside, rim) you could just extract the outside surface, delege the others, and generate a new wall thickness with offsetsrf.

Ok thanks