Lacquer or Varnish to finish a guitar?

Hi, I've just had an artist do some work on one of my acoustic guitars. Its done straight onto the sanded bare wood using sharpie, all I have to do is give it a finish to stop the design getting damaged and to give it a glossy shine.
A lot of people recommend Lacquer but what type should I use?

Nitrocellulose? Poly?

Others say Varnish but I've heard it can become tarnished from sweat and heat.
This coat needs to stay on indefinitely as I cant sand it down again to apply a new coat without removing the art. Please help!

iceng5 months ago

A collector old friend of mine recently started to clean, repair and ready his four digit priced guitars for auction. I will ask for you and report in several days.. -.-. . -. --.

iceng iceng5 months ago

BTW guitars value depends on expert care NOT Furniture Varnish.. -.-. . -. --.

Yonatan245 months ago

https://www.youtube.com/watch?v=bbiXJd_1l8Y