Some web research brings me to the conclusion that a clear coat should be used indeed. You'd want to use it even for solid paint job without any decals and images. My two concerns are - (1) will it whiten the paint / image? and (2) can it damage the paint / image? I understand that if you apply too much of the stuff then it's probably a yes for both, I wonder how forgiving are these clear coats?

Greetings everybody,

There's a number of FAQs / tutorials about how to paint your gameboy in solid color or multiple colors. It seems to be pretty straightforward. What I can't find is how do I transfer an image on a gameboy shell? Like it's done in the picture attached. Thanks!