Yes, I advocate POR-15.  Big problem though as you really need to rough up the surface to get the POR-15 to stick.  You won't know it didn't stick until much, much later.

On 2013-06-20, at 5:32 PM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:

> Hi all me again! Ive got a question about my new fuel tank. My fuel tank is
> bare steel would it be wise to coat the exterior with some form of paint/
> bedliner stuff to prevent external rust or would that cause more rust?

Cheers,    

Frank Condelli
Almonte, Ontario, Canada
'87 VW Westy, '00 Kawasaki 250 Sherpa, "98 Ducati 750 Monster & Lionel Trains (Collection for sale)
Frank Condelli & Associates - Vanagon/Vanagon Westfalia Service in the Ottawa Valley
BusFusion a VW Camper camping event, Almonte, ON, June 06 ~ 09, 2013