I just flew out of Copenhagen on JL5324, which is AF1151, in J. The SK lounge was quite happy to scan me to in to Business Lounge, and flashing my EBG got them to open the doors to the sacred halls upstairs. During the renovation of the CPH Apartment lounge, the SK lounges are a more pleasant place to spend the time.
Here is what I am looking forward to test, JL codeshare on Air France in Y gives me lounge access based on JL status. So if in Y, I am perfectly fine to get in to CPH Apartment, but can I use the SK lounge as well? Next time on that one....