Common lacquer and acid catalyzed finishes are the other choices among guitar builders. The common lacquer finish is obtained by spraying lacquer (usually nitro-cellulose) to the surface, allowing it to dry, sanding it, then repeating the process several times until a suitable coating is achieved.
An acid catalyzed finish (sometimes called “resin” finish) consists of two parts which are mixed just prior to application; a type of varnish and a hardening agent. The finish is quick drying and very durable. Since it is also not solvent soluble, it needs to be sanded away completely in order to be restored. Kohno and Jose Ramirez are two well-known makers who have utilized this method.