Products such as Manns Premier Door Oil, Osmo Door Oil (3060) and Fiddes Door Oil have been specially designed for use on veneered internal doors. It gives interior doors a tough, durable, clear, satin finish. Always check the door manufacturer's guidance before treating veneered doors as in some cases, it may invalidate the warranty of the door.
In our opinion, wood oils are one of the best options for wooden interior doors. They nourish the wood and prevent the door from drying out therefore protecting the door from shrinkage, splitting and warping. An oil finish is also very easy to maintain and repair if it becomes dirty, scuffed or scratched.
This can depend on the colour and type of finish that's desired. Wood stains such as Manns Classic Pine Stain are a great way to stain interior doors as they offer the widest range of colours and can often be intermixed (from the same product range) to achieve many thousands of wood tones and shades. Water-based and solvent-based liquid stains must be over-coated and sealed into the wood with a clear wood oil, varnish or wax. There are a wide range of pigmented or coloured wood oils, varnishes and waxes that both colour and seal the wood in one which are also ideal for interior doors.
If doors have been previously oiled or waxed, there's a good chance that paint will not effectively bond or adhere to the door surface. This could result in paint simply peeling off or in the case of water-based paints, simply running or dripping off the door surface. Our advice would be to get the doors professionally stripped. It is possible to remove the old finish by sanding or using a wax and polish remover but this could be time consuming and messy.
Interior Oak veneer doors can be treated with either a wax, oil or varnish. Using a clear door oil or varnish will enhance the natural grain and character of the wood, they will also slightly darken the wood to give it an almost damp-like appearance. Using a clear wax such as Fiddes Supreme Wax Polish will keep Oak veneered doors looking natural but offer less protection than oils and varnishes against scratches and scuffs.
For durability, varnishes offer the best protection. For ease of maintenance and repair from minor scratches, scuffs and scrapes, we recommend using a door oil or wax. Always check with the door manufacturer's guidance before applying a finish to a door.
We always recommend Manns Extra Tough Interior Varnish for internal veneered doors. It is a water-based clear varnish and is available in four sheen levels from Matt through to High Gloss.