I am going to make some signs where I will rout in names and symbols. The
routed channels should be about 1/2" wide and about 1/4" deep. I would like
to just be able to pour some paint into these channels, and let them sit in
the sun for a week and dry. Any suggestions on a long lasting paint that
will hold its color for a good while, too. The signs will be made out of
redwood, and will be out in the sun, rain, snow 24/7. Or a better
suggestion for a type of wood?
Thats a lot of paint for a line. It may take more than a week to completely
cure. Why not brush it in, most Acrylic paint is too thick to fill a groove
without some troubles, you would have to pour so slow that you could easily
brush in the same time. Are you looking to save time that way or achieve a
solid fill of paint (if so try tinting some epoxy).
I would not cut channels and fill them with paint. Likely, first of
all, to have the surface crack or blister. With a thin coat, the
routing is likely to get moisture in and allow the paint to peel. Paint
film that covers such narrow areas (bottom and sides of your channel)
probably won't grip as well as the rest of the board. Use good exterior
oil primer and paint.
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