I'm building a bath vanity painted to match other woodwork in the bath.
Not happy with the rather rough feel on the birch ply after a coat of
1-2-3 primer and a top coat of high end latex. Thinking about using
some 220 paper and recoating. Will this yield a smoother finish?
Prep work is essential to a good finish. If you don't do the prep,
then you will certainly not get a nice smooth finish on top of your
surface. The primers and paint magnify the imperfections, unless you
pour finish on your project.
You can sand out the rough spots if they are raised wood fibers and
recoat. But if the surface was improperly cleaned to be free of dirt,
dust, sanding dust, etc., and it is trapped in the primer and paint I
would sand all of it off and start over.
Wait a few days before sanding to allow the paint to cure a bit and to
keep from simply rolling up the latex and making your surface even
rougher. The fresh latex will easily scratch with sandpaper, leaving
behind grooves that will show in your subsequent coats of paint.
If you sand off the primer and paint, be careful with your prep; sand
your primer as needed and make sure it is glass smooth and clean
before applying finish.
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