Re: [bolger] Digest Number 2965

> Posted by: "Doug"dougpol1@...dougpol1
> Date: Fri Jul 28, 2006 9:15 am (PDT)
>
> Along this same line has anyone tried pure acrylic over latex acrylic
> primer. I primed the interior of my Elver with Latex acrylic thinking to
> finsh with the same in a finish coat. Since some are saying use 100%
> acrlicr have been thinking about using pure acrylic as a finish coat.
> Any body have any experience with this. This might be better than the
> oil paint in this thread.


Generally speaking, latex paints are not latex anymore. Latex used to be
used, but now they are typically not latex, but acrylic. Latex has come
to mean water-based, and acrylic latex means an acrylic solid is ground
up REALLY fine, and carried in a water-based medium, which evaporates
out, and the particles form a nice sheath.

Fromhttp://cage.rti.org/altern_data.cfm?id=wbafal&cat=Gen_Info. . .

A latex is a water-borne emulsion of an organic polymer.

The most significant thing about latexes is that they use water to
fluidize materials that are not inherently mobile fluids and have
virtually no water solubility.

Waterborne acrylic latexes include polymers, such as vinyl acrylic and
styrene acrylic. The resins are characterized as high-molecular-weight
polymers dispersed as discrete particles in water.


-Chris



> Chris, you have given me a lot to think about. The
> deck house is on a Cheoy Lee Monterey Clipper, a
> salmon-troller type boat. It has a high motor-vessel
> type house, and I would like to keep it painted. What
> if I strip it to the extent possible, hit all the bare
> wood with an epoxy sealer, then overcoat with a good
> latex primer and acrylic topcoat?


I think that this would be temporary, and hard to fix. You cannot get
the same kind of seal over the latex as you would over the primer/paint
remaining. If you give the paint a good sanding, and leave enough tooth
for the epoxy, it might work, but it would be a maintenance item to
watch for years to come.

That still might be the kind of bet you wish to make.


> I have always used
> latex on the topsides and superstructure of ply-epoxy
> boats with good results, but this is my first real
> wooden boat, and I had assumed (maybe wrongly) that
> oil-based marine paint was better for the topside
> planking, cabin and housesides.


I do think that, in general, oil would be better for you. Hard,
stronger, more abrasion resistant, good to the wood underneath.

Much harder to work with, though.

-Chris