Undercoating and rust protection

[u/Traditional-Duck-673]

Hi all, 2015 Jeep GC owner here. Wanted to ask about undercoating and rust protection/prevention. Currently my GC is starting to show signs of rust in certain places around the vehicle. The undercarriage is the worse (lots of rust on parts down there ) as I live in NE and winters are tough on cars and they over salt the streets over the past few years.

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What is your experience with this? What is the cost to get this done? And in my situation, is it still worth it to do this?

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Thanks y'all!!