This isn’t strictly a music question but I think it’ll fare better here than on the DIY / Home Improvement exchange, so hopefully that’s okay!
My wife and I got all our guests to sign and draw on an acoustic guitar at our wedding, using Sharpie markers. We’d like to put it up on the wall, but I’m worried that the Sharpie will rub off or be damaged / smudged. Note: I don’t really ever intend to play the guitar (though who knows, it’s a 3/4 sized acoustic so it might be nice to teach kids on some day!)
What kinds of options do I have for protecting the guitar, to ensure that the Sharpie marks remain there permanently? Some kind of coating, sprays, etc., perhaps?