Can you varnish over decking oil?

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 ensure that it is compatible with an oil finish.Click to see full answer. People also ask, can I varnish over Decking Stain?The same goes for polyurethane. If you are looking for a more shiny finish on your exterior wood surface, it is best to choose a deck stain that will give you the appearance you are looking for. Applying a clear sealer or polyurethane over a deck stain will cause more problems than it is worth.Beside above, can you varnish over Thompson’s Water Seal? Thompson’s Waterseal with stain is a protective finish for exterior wood. I’ve used a marine spar varnish on stained wood on my stained wood porch posts and railing and it held up very well but that varnish was NOT applied over Thompsons, a product which should provide all the moisture protection you need. can you varnish decking? While we are not keen on varnishing decking, this is an appropriate treatment for some furniture and exterior woods. Varnish will protect the wood, but it will create a glossy and more dangerously, a very slippery surface. Clearly this is not what you want on your decking.Should I oil or stain my decking?Both oils and stains have their own distinct advantages. Essentially, what differentiates oils from stains is that a stain will improve the appearance of the deck by changing the timber colour; while an oil will enhance the current colour if you are wanting to leave your wood as is.