Check the correct finish for it, it can affect the sound!
there are the following:
NITROCELLULOSE finish high gloss paint especially developed for guitar. Available in GLOSS or MATT, or CANNED SPRAY.
Get merge layer by layer of varnish hands with guitar, leaving the wood transpire without interfering or modifying the sound reproduced by the body of the guitar, getting a pure vibration. Nitrocellulose with great elasticity, anti-crazing, mirror effect. Very easy application, repair and maintenance.
Two component POLYURETHANE finish, excellent body, hardness and elasticity. Colorless or white, gloss or matt
These properties together with its high transparency give a sense of depth of the film in the unsurpassed guitar nitrocellulose, shellac or water based. And with fewer layers of product we get more feeling of brightness and body. The high impact resistance and scratch resistance of polyurethane varnish provides maximum protection, security and durability to the guitar with the passage of time.
WATER-BASED finish to paint guitars. CLEAR MATE or BRIGHT, WHITE or BLACK has the ability to be more wood lacquer leaves perspire for a unique sound on guitar. Get honed natural effect of easy, clean and easy. No evaporated solvents, environmentally friendly, and can be applied in garages, storage rooms and homes without disturbing the neighbors
polyurethane transparent gloss... I think that is what e-guitar manufacturer's use commonly for their finish coats for their final coats.
check this video too...