I have taken EVERYTHING (from the front seats back) out of my Westy.  As
I look around, I want to suggest several worrisome items. Here is one:

The four plastic covers for the Fridge Flue. Electricity, Reservoir water, Mains
water, all had rust around the edges of the metal holes.  I could not see any
rust with the covers ON, but with  the covers off, I could see the rust.  Now
the bad news is that the rust had grown around on the INSIDE of the panel
too.  As I had all of the interior panels off and the insulation out, I was able to
sand off - use rust converted paint, anti-rust paint primer and then top-coat it
all prior to putting the utility covers and the interior back together.  I also
used some seam sealer around the top and both sides (but not the botton) of
the plastic utility panels as I installed them.

I wrote this to warn you that yours are probably rusting too, and mine Westy
is a 'new'  1991.   Malcolm S