To even go a step further, I have used a plactic air welder that my brother has.  I have fixed many interior parts with it.  He fixes vintage snowmobile hoods with it.  Very professional results.

dylan

----- Original Message ----
From: Jim Felder <felder@KNOLOGY.NET>
To: vanagon@GERRY.VANAGON.COM
Sent: Wednesday, February 7, 2007 11:08:05 AM
Subject: Comments on plastic repair system/cup holder repair

For those of you who have tried to used epoxy to repair broken
plastic items, you've probably been underwhelmed at the results,
especially when gluing together chipped and broken pieces (bonding
one flat surface to another usually works fine, it's the pieces that
crack through and need repair that seldom hold).

Yesterday, a four-legged passenger jumped into a front seat and
damaged an open cup holder. As much as the OEM holders cost, I
thought I'd pick up some epoxy and give it a try, but I didn't expect
much as I had not had good success in the past when the pivots broke
off of the lower part of the holder.

One of my FLAPS had something called NAPA Plastic Welding Systems.
Don't use it in a room you're going to be breathing in! It REAALY
stinks. It is a 2-part epoxy, of course, and it dries a milky white,
so I used as little as possible on the black cup holder.

In a couple of hours came the moment of truth... would the repair
withstand being forced over the protruding hinge pins? It did. I put
a little silicon lube in the joints and on the metal spring plates,
and the original "snap" came back the holder, all ready to go back in
today.

For stuff like repairing heater vent covers and broken off heater
valve cover pins, where strength is required but not much bonding
surface is available, it looks to be the stuff.

Jim