undercarriage

Hello all, I did a search on undercarriage rust here and see Fluid Film is well recommended. There is surface rust on my 2015 JKU. Is Fluid Film still recommended? We honestly don't offroad but I also don't want to get frame damage. Thoughts? Thanks Hsnopi

So, I've never done any rust cleanup or preventive before. Just bought a 2007 wrangler and it has a little surface rust on the undercarriage. I'm currently cleaning with a wire brush and was just wondering, when it came time to paint, how did you all keep the exhaust clean if using aerosol...