How to mirror sculpting in editmode?

Hi all I need to ask for help.
Something went wrong with the sculpting. The Symmetry didn’t work and now the other hand of my model is terribly destroyed.

When using the mirror modifier the sculpting paint will get resetted. When using mirror in editmode the sculpt paint doesnt get mirrored, just the mesh.
This results in a deformed arm.

I want to fix that but I need to know how to mirror the sculpt painting on the mesh. Can someone help me with this? Thx in advance

Uhm I found out that the sculptpaint does get mirrored, but the mirror in edit mode also inverts the contrast of height. Can someone tell me if I can invert the paintcontrast of the sculpted shape?