I have a FedEx bubble mailer and I was wondering if I can reuse this to mail books?  I was thinking of putting them in the mailer and then wrapping in paper and LOTS of tape, but if my package is inspected will it not be delivered because of the fedex mailer?  I know I can't reuse priority mailers/packaging, but I don't remember ever reading anything about Fedex.

Reusing FedEx packaging should be just fine. Just marker out as much of the FedEx name as you can  and and barcodes on the package.

thats fine

you could even leave it allone

i  once used a UPS enevelope to send  a  book via USPS

it got there fine

I recently asked this same question at the USPS counter.  They have no problems with customers recycling packaging from other carriers, it means nothing to their system and does not confuse routing. 

Thank you, good to know that it will arrive safely, and next time I can simply package it and not wrap it up in brown paper.