Hey most knowledgable & experienced dudes! A new Mazda 3 SP23 with my name on it arrives next month and they want to sell me tint, rust protection, paint protection, and interior protection. TINT: darkest legal tint, $695. Rust protection: module, charges the chassis, runs off the battery. Paint protection: protective coating. Apparently stops bird-crap, etc. staining the duco. Interior protection: never have to ArmourAll the inside or anything - seats/carpet sealed & warranted. I'm pretty sure the tint can be done later for a couple of hundred bucks, but are the other bits worth getting? or are they gimmicky, dodgy dealer screw-you-out-of-extra-cash options?