I'd eliminate the foil and raise the temp a bit (depending on what temp you're cooking at already) or put over some hi heat like ron said.
It's not the skin that is the problem, it is getting the fat to render out.
Lonestar 24" Vertical offset w/ Insulated Firebox & Performer Platinum
Former owner: Jambo Backyard, Klose BYC, Med. Spicewine, Pitts & Spitts, XL & (2) Med. BGE's, 22" WSM & (2) 18" WSM's, 18" & 22" Weber Kettles