He's not MIXING oil and water....either primer, properly cured, gives a
dry surface on which to apply paint or wallpaper. Provided the primer
is suitable for fiberglass, there should be no problem. For an exterior
door, oil might be a more durable finish. Just read the labels.
best primer is a solvent thinned epoxy, then a phenolic primer, then an
'oil based primer', then a water based primer....
water based epoxy primer probably right up there with solvent thinned
-- only the worst stuff available at the box stores.
On Wed, 08 Sep 2010 15:21:12 -0700, David Nebenzahl
Why not oil based? Because good acrylic latex actually stands up
better - and if you are going to use higher end paint - like
automotive paint, the water born pre-catalysed urethanes are better
than air dry enamel and less fuss than acrylic laquer or acrylic
enamel.- and every bit as good on fiberglass.
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