Blake Pagan

Hey guys, I just bought a 2000 Trans Am, and its in great shape in terms of rust and everything, the problem being where I live in NY, its hard to keep things that way. I have a semi-local shop that does Rhino lining, and I wasn't sure if that stuff would end up being too thick/heavy to coat the underside of the car and wheel wells with. And I have seen some kits online with an oil-based, thinner spray. If I go that route, I was wondering what can and can't/shouldn't be sprayed? I know the exhaust obviously shouldn't be coated, not sure about struts, springs, that kind of stuff.

Thanks for the help!