Can You Put Varnish Over Oiled Wood?

Can You Put Varnish Over Oiled Wood? Can you put varnish over oiled wood? Compatibility. In most cases, you can safely apply varnish over an oiled piece of wood because the varnish contains oil, as well. Water-based varnishes are an exception to this rule. Look for an oil-based varnish, and read the package directions to