Re: Epoxy Coat MDO Before Painting?

--- Inbolger@egroups.com, bluwatrnh@m... wrote:
>snip If I use a really good paint, such
as
> Awlgrip, over the MDO, why would I want to epoxy the surface paper
> first?
>snip
> Regards,
> Dennis

I suspect that MDO, since it's for signs, would accept a much wider
variety of paint than epoxy. Getting primer to adhere to epoxy can be
a problem, though there are certain kinds of paint which do fine (see
the archives). I've had the adhesion problem twice now, once on a
boat
(only a paint test) and once on an RC model plane.
On Fri, 28 Jul 2000bluwatrnh@...wrote:
> I was wondering if epoxy coating the MDO plywood before painting
> has any advantage?

Not much, unless you like to spend money. The surface is already water
resistant, and a good primer and paint will do the trick.

Of course, if you're glassing bleow the waterline, that's all you'll need
to do, and of course, you wouldn't want the overlay side (resin and kraft
paper) to be your abreasion resistance.

But you can paint or epoxy right onto the resin coating side, without
special prep (a cleaning is always a good idea).
Hi All,
I'm dreaming of my next boat project, possibly the Topaz. I've been
reading this group about MDO plywood and the idea of having a
"paint ready" surface really appeals to me. I believe
fiberglassing is really important on the bottom and over the chines
because of the needed abrasion resistance in those areas. However, I
would be willing to sacrifice some abrasion resistance on the side
and cabin panels if I could avoid spending hours fairing the hull
before painting.

I was wondering if epoxy coating the MDO plywood before painting
has any advantage? I've heard of people coating the MDO with epoxy
before painting but I don't see any advantage to this that would
justify the extra cost and weight, not to mention the additional
epoxy curing and sanding time. If I use a really good paint, such as
Awlgrip, over the MDO, why would I want to epoxy the surface paper
first?

By the way, I've been watching the Topaz project on Duckworks. Very
nice job, Brad!

Regards,
Dennis