What does "Guaranteed Forever" mean?

Provided that Rust Check has been reapplied annually to the vehicle by a Warranty Approved Location, within 13 months of the last application, Rust Check warrants that it will repair AT ITS COST all original body panels from the window sills down which have rusted through from the inside out. There is no limitation on age, mileage or transfer of ownership. 

Applicable to all vehicles three years or newer.