Friends, I need your help.

I made a top quilt out of 1.1 Down Proof ripstop. I used two colors (Green \ Brown), but the brown (supposedly down-proof) ripstop is allowing down to escape through the material.

  1. Is there anyway to "Down Proof" 1.1 calendared ripstop material?
  2. Any cleaver fixes for replacing the bad fabric?
  3. What would happen if I sewed another layer of down-proofed ripstop over this one?

Thank you for your help!