Reply To: Scaling thikness problem
Difficult to recognize. The upper part looks good. I would probably check if you have duplicate or useless vertices. Mark everything in vertex mode and with key M -> Merge by Distance. A small window will appear at the bottom left where you can set the distance.
You could also check the normals of the faces. Select Face Orientation and if any are red, flip or recalculate with ALT + N.
