Hi Sammy, I presume HF refers to the Flow super? I am surprised that you put it on in September - most beekeepers are shutting down for the winter by then, even in California. Unless you have a really good nectar flow during the winter, the bees will not use that super, and they may actually appreciate you removing it at some point, so that they don't have such a big home to keep warm during the colder months. The other thought is that there is a risk of them sealing the Flow cells with propolis during the winter - bees love to stick up any drafty gaps. That can make it hard to harvest later, as the propolis seals are quite tough to break.
My hive scale shows that there wasn't much of a nectar flow in early November, as the hive got lighter from bees eating existing stores. However, around the 15th November, a modest flow started, probably from Eucalyptus and Pepper trees which are flowering in San Diego at the moment. I certainly won't be putting a super on the hive though, they have enough space for storage after eating reserves during the fall.
Anyhow, welcome to the Forum. I agree with your thought about rubbing or brushing some wax onto the frames before the next nectar flow.