I bought a Rust Free 84 K5 Blazer from North Carolina. Yes, it is totally RUST FREE! I took it to my local Ziebart Shop for their rust treatment. When I inspected the work, I asked why they did not spray the radiator support or the firewall in the engine compartment. My local dealer said (direct quote) "Ziebart is petroleum based. Heat from the radiator will cause Ziebart spray to catch on fire". He said he couldn't spray the firewall either because "Engine heat would cause the petroleum based Ziebart spray to catch on fire". Does Ziebart turn your vehicle into the Hindenburg or did this guy do a lousy job and then lie about it?