Auto Insurance for Central and South America


We're bouncing down Baja on our way down the PanAm and are trying to figure out the best way to be insured south of Mexico or if we even want to at all.  I've learned that insurance for Guatemala (and every country but Costa Rica for that matter) is quite difficult to obtain.  Is there any way to get a policy that will cover us completely for the remainder of our journey, or do we need to get a different insurance policy before each border crossing?

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