How to Lime Wash (also known as liming or Whitewashing)
Start by preparing your wood for treatment. If it has a varnish or stain on it, sand this away down to the wood grain so you are starting from scratch.
If you’re starting from a natural wood, you can skip sanding if you’re confident that the surface you are working on is smooth. However, you may want to use a wire brush to open up the grain of the wood to ensure that you get a more prominent finish with the lime.
Then, you want to remove all dust from the wood by hoovering it, and wiping it down with a damp cloth. You can do this with white spirits to clean the wood too.
To bring out the best colour in the wood, you can apply a light layer of shellac varnish before liming. To do this, mix 1/2 measure shellac varnish with 1/2 white spirits, and glide a cotton cloth over the wood to create a light seal. You don’t need to do this heavily, as you want the lime to be able to get into the deep grains of the wood. This should dry fairly quickly once done do you can begin your liming almost immediately after.