If the 1 mm thickness is critical, I'd use the fiberglass and regular
epoxy route rather than the plumber's epoxy.  Also, I would think
colorizing the plumber's epoxy to protect from UV rays would be an
issue.   You can color the epoxy with regular resin colorant,
graphite powder(if you want a near black,) or get some powdered
tempra paint from the Hobby/craft store and add enough of it to get
an opaque color. Using simple Saran wrap or Glad wrap is all the
barrier.  Once it's set up and fully cured, you could sand it down to
your 1 mm thickness.  The plumber's epoxy won't have the strength of
the fiberglass part you'll need for the lamination, poly doesn't
conform well to intricate curve.  You could also use a mold release
like PVA (poly vinyl alcohol) or regular mold wax(many
coatings).  The epoxy I prefer is the Gougeon Brothers  West System
epoxy and it's marketed in small ketchup package sized resin and
hardner to mix, all the way up to 5  gallons of the stuff.  I think
you can still buy  a selling unit that has like 6 of the pouches in
it for a reasonable price.

Good luck

DM&FS

At 10:21 PM 1/13/2010, David Beierl wrote:
>At 11:17 PM 1/13/2010, Zoltan wrote:
>>Where do I find such an epoxy?  What would be the name of it?
>
>FLAPS and hardware stores.  Various brands; sometimes called
>plumbers' epoxy.  Here's an example:
>http://www.buy.com/retail/product.asp?sku=208053063&listingid=46079163
>
>Yrs,
>d