Just for informational purposes.
It is not unusual, when someone is going to put on a surface film finish, to
use an initial coat or two of oil to enhance the grain, the so called
process of popping the grain.
Applying five coats of oil for the effect would be excessive but not
harmfully so. One or, at most, two, would be sufficient.
My personal opinion is that, since oil based varnish already has oil in it
the same effect can be achieved with a thinned sealer coat of oil based
varnish. . What would befit from the application would be water based
I also don't like the effect on very light wood since the yellowing puts me
in mind of "yellow snow". Now, on a darker wood such as walnut or mahogany
it's a different story.
However, that is only my opinion/taste and not to be taken as condemnation
of those who may disagree. .
In general I'd say that the use of a surface finish over an oil finish is a
harmless exercise with some possible befits, but the use of two different
surface finishes, say varnish over shellac, is, at best, a non productive
waste of time, at worse, a recipe for disaster.
Note, when I say varnish over shellac I am alluding too a built up shellac
finish and not a sealer coat of thinned shellac.
Just some thoughts
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