If a wooden surface looks like it has been coated already with a product it is always good to find out what type of finish it has. The product you might want to apply to the wood can get affected and may not provide the desired finish.
For example, you cannot apply a 2-pack PU over a polished or varnished door. However, an existing door that has been NC Lacquered can be re-coated with STYL PU varnish or Melmyn Wood finishes, after cleaning. Here are few pointers to find out what your wood has been finished with.

  • Try putting a little NC Thinner on a small unnoticeable area. If it is brittle and dissolves the surface coating then it is likely to be a Shellac wood polish
  • Try buffing it with a cloth soaked in NC Thinner. Most wood-polished surfaces will become shinier once buffed

If the wood has NC Lacquered Surfaces

  • Try buffing the surface with a cloth soaked in NC Thinner. The surface coat will melt and shine. You are also likely to see a fuzzy image reflected from the surface
  • Keep in mind that NC Thinner also dissolves most shellac polishes. Hence check if the surface is wood-polished first and then perform this buffing method for checking if the wood has NC Lacquered Surface

If the wood has Varnished Surfaces

  • A varnished surface is hard to a touch
  • It also has a reflective surface. Even a matt varnish reflects light more than a Shellac polished surface
  • Try buffing the surface with a cloth soaked in NC Thinner. The coat on the wood with varnish surface does not dissolve easily in NC Thinner

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