How do I paint a subsurface scatter map like a metalness or roughness map .

[James_Unknown.64]

I can’t make the subsurf map only apply, to some parts of model, can one paint it, like a metallic map, is there a place, or so, Please help . . . <3

[RSEhlers]

You can. Paint a typical B/W mask lake any transparency mask…( perhaps in an external program…you want a really smooth blend translation)
Then you can use it as a factor on a Mix-RGB node.