Dear Jason,
Thank you. I did contact technical support and did get a (I hope) a definitive answer from them. I am posting it hear in-case anyone else is looking for the answer. Visa and Mastercard are the only two that are excepted. Maestro/Switch require 3D Secure authentication and is only valid for purchases made in GBP. Here is the link to this information from paypal.
https://ppmts.custhelp.com/app/answers/detail/a_id/877