His Greeny Les Paul sounds so good on the most recent Metallica album.
It's definitely on the outro to Halo On Fire .
I like that Kirk paid a fortune for it - ( allegedly ) and it doesn't sit at his house in a glass case on display - he plays it live.
Joe Bonamassa allegedly has a security team JUST for his 1959 Les Pauls ( The year 1959. he doesn't own 1,959 Gibson Les Pauls AFAIK
)
Which is right I reckon. They're supposed to be played. Plus Metallica probably have the best guitar techs in the business in case anything goes wrong.