Draw an overlay on 3D model

Hi, I am working with a 3D character model and I am struggling to add an overlay to body part of the character (as in this image).

I need to add/remove this overlay dynamically to different body parts when it is needed. It would be great if anyone can provide me directions to achieve this.

Thanks.

You want to highlight a part of a body, or draw clothes on top ?

I want to highlight a part of the body not to draw clothes on top.