I created a path Inside that path I created several more paths and group those on separate layer. Inside paths doesn’t have any fill but have a stroke of 1.

Since I want that stroke to be open( or transparent . I don’t know the exact term, I want the stroke line to show the beneath color), I selected the stroke and chose Object > Flatten Transparency. Then Selecting both, I chose Pathfinder > Minus Front.

Result:

Now I want the above design to top of this like and want to create a outer stroke for my star and I want that stroke line to be open (like the paths within star)

I beating my head with this for the last 48 hours but i couldn't find where I'm doing it wrong. If it any help, this design is for t shirt design experiment.

Can anyone help me with this? Your help much appreciated.