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Re: Board with MDF? and Finished with Paint

Scott said:
"The water vapor permeability of water-clean-up finishes is the key reason
such finishes are better for exterior wood applications-- the ability to
pass the water vapor makes the build up of moisture underneath the paint
less likely and the paint, therefore, less susceptible to blistering
peeling.  This virtue is somewhat compromised with an oil based primer below
the latex."

Now that you mention it, the paint guys said the same thing. So it was
probably a mistake on my part to do that. In any case, MDF can be used in an
aquaria application. And boy is it heavy!