Hey Gang, former Chevy owner here that just bought a 2016 Ford F150 work truck. After a couple weeks I jumped under it and noticed surface rust on the rear diff, some hose attachments and other areas. I hit it with some inhibitor and then some Fluid Film to protect the surfaces, but the rust is still there. My buddies say it isn't a big deal, but I wanted your take on it since I value the opinions here on TF. Thanks in advance!