I would go for something a bit heavier like EpiDerm, which you can just buy from the chemist, and smooth it gently over the sore areas as many times a day as you can, maybe morning, night and two in between. Little and often is best.
Have tried creams before sudo, which will help but the down side is it always makes things worse ( to start with sudocream been the worse with dd sreaming) So understandable dd reluctant to apply the creams in the first place.
She's nine and I really don't think she could get more clothes on. DD is one of the few girl in her class that wears thermal trousers and long sleeve vests.
We put on some E45 last night and again this morning, the worse was her hips which are still a little sore but due to the school playground been like an ice rink all day she not really been out today. So don't know what they might have been like if she had been out.