Wood Varnish For Your Exterior Doors
Everyday wood varnish enhances the look and feel of your wooden doors and furniture, as well as providing protection from day to day use. Now, for interior applications this might be adequate, but step outside and you’re going to encounter a few problems. Australia’s harsh environment is no place for everyday wood varnish,as even indirect sunlight will quickly degrade most varnishes. When it comes to exterior timber protection and preservation, you’re going to need something tougher. A good ‘Marine Grade’ wood varnish will provide years of protection without the need for re-coating, and will most importantly highlight your beautiful timber. Monocel Gold Wood Varnishes come with a specialised UV protection additive called nanoZ or more commonly, invisible zinc. This gives the varnish the highest level of UV resistance, protecting your timber many years longer than a regular wood varnish.
We’ve put together a brief guide to varnishing your exterior doors.
Step 1. You’re going to need to sand back your door (with the grain) using 220-240 grit sandpaper, which can be picked up from your local Bunnings. (You may need a lower grit, around 80-100, if your door is in especially poor condition to get it smooth and ready for some wood varnish).
Step 2. Once your door is smooth, you’ll need to remove any fine leftover debris using a ‘tack cloth’. Basically a tack cloth is slightly ‘tacky’, sticky or damp, and will pick up the sanding debris, ensuring the door is perfectly clean for varnishing.
Step 3. Now for the first coat, you’ll need to dilute the wood varnish down with around 10% mineral turpentine in a separate container. This ‘sealer’ coat aids the penetration of the varnish, giving you a great base layer to work on. Just make sure to thoroughly stir your varnish regularly to keep sediment form settling on the bottom. (Do not use an electric mixer or shake the tin, as this creates air bubbles which will be hard to remove upon application).
Step 4. Apply 2-3 extra coats once you’re first ‘sealer’ coat is dry (this should be after 4hrs for an oil based varnish like Monocel Gold, or 2 hours for a water based varnish like Monocel Blue). Each subsequent re-coating after the first should be performed after 8 hours, with a light sand in between. Application can be by brush, roller, spray or foam applicator pad. (We find a foam applicator pad gives the best finish and is the easiest to use).
Monocel Gold Oil Based Wood Varnish: 1st coat—4hrs.(sand)–2nd coat—8hrs.(sand)–3rd coat—8hrs.(sand)—4th coat
Allow to dry for 24hrs
Monocel Blue Water Based Wood Varnish: 1st coat—1hr.(sand)–2nd coat—4hrs.(sand)–3rd coat—4hrs.(sand)—4th coat
Allow to dry for 24hrs
Step 5. After allowing to dry for 24hrs after your final coat, you’re door is ready to face the world.
For application videos, please visit the Bondall youtube page.
- Take your door off its hinges to make your job easier.
- Clean up your equipment using mineral turpentine
- Dispose of any extra wood varnish as per your council regulations, or paint onto old newspaper, wait to dry then throw away.