Nitrocellulose Lacquer, or simply “Nitro,” is a coveted paint finish in the guitar world due to its beautiful aging qualities, its effect on the tone of the instrument, and its period-correct properties for the golden age of guitars. In many ways, Nitro is a more organic substance than modern Polyester and Urethane paints, and the lacquer drying process results in a thinner coating. For these reasons, it is therefore believed by the vintage guitar community that the inherent resonance of the wood is allowed to shine through best with Nitro. The distinct properties of this finish are important to understand as a Nitro instrument owner for maintenance and care purposes.

Every material used on a guitar will expand and contract with temperature and humidity fluctuations, but the wood will have the most drastic rate of movement. When the change in temperature happens quickly, the Nitro paint can crack or “check” because it will not expand or contract as quickly as the wood. Over time wood loses its moisture and shrinks, which can also cause the Nitro to sink into the wood grain or glue seams.

Similar to every piece of wood, every Nitrocellulose Lacquer paint job has its own unique characteristics. The environment in which these instruments live and the attention by the owner will determine how they age.

Chemical reactions will occur if the Nitro is brought in contact with certain Silicone, Vinyl, Plastic, or Rubber products. Be very careful to use the correct type of wall hangers, guitar stands, and guitar polishes to avoid degradation of the finish. Nitro disclaimers will usually be attached to guitar products for this very reason.