Obi Suit - Questions about cloth in characters

[Rettosukero]

Hi !
It's not my model.

Anyway I did it this way.
(in blender) I made lowpoly mesh. Then I skinned it (highpoly is skinned as well) Then I exported it as full (all models and armature) 
I've gave lowpoly mesh cloth obi cloth and highpoly mesh a proxy.
I've made topology out of low poly mesh.
I've made skin and I used lowpoly object as source and highpoly as target.
And then it comes to painting skin master I am confused. Which model I do paint? lowpoly or highpoly? Or both? 
I tried to check your threadcoat scene but when I check skin painting I cannot see anything no matter on what object I check and what layer I check.

What now?
When I paint only highpoly mesh and bind and then apply this skinmap to mesh in scene nothing happens.
What am I doing wrong? Is it about some parent-child relations? 

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I've painted both lowpoly mesh and highpoly mesh and after updating proxy to highpoly and hitting play lowpoly mesh animates and highpoly lies down on floor and do nothing. And look weird... like it's different mesh.

OK I think I get it. You skin both of them.
But It acts weird . It's sticks to lowpoly mesh looking simular (like well... lowpoly) And it's like storm. I guess it's because one side affects other (I am talking about pants) What now?