The only thread I could find about arriving as a UA customer was
here, so I thought I'd ask my question in a newer post.
I am set to fly EWR-LHR-FRA in J (the non-stop on UA was sold out). I'd like to take a shower if I can on arrival into FRA but the Welcome Lounge information page seems to state that only flights via MUC/GVA on LH metal get access. Is that really the case?