Warren DeMartini

According to Guitar Geek's rig diagram, DeMartini uses Charvel San Dimas (2 of them and they're custom painted).

In August 2022 edition of the Guitar World, DeMartini mentioned the relationship with Charvel:

That was part of the revolution Ed started, where you could put together your own guitar. A friend of ours happened to get a job at Charvel, and for a little while we could buy guitars and necks that were seconds – the stuff Grover wanted to throw away. You could get a guitar or a neck for cheap, so that's what I did; then I'd buy hardware and pickups and that kind of thing. Skip ahead a few years and I got a message from a friend who was a graphic artist at Charvel: "Grover Jackson wants to see you." I immediately thought, "Oh man, he wants me to rat out whoever was selling me these seconds." Robbin and I drove out to Charvel, and Grover said, "You guys are obviously Charvel fans. I'll build you the best guitars I can, and we'll work something out when you can afford it." Which was awesome. That's right around the time when the "crossed swords" guitar was built.

Aside from legato soloing and crunchy riffs, one of Warren DeMartini’s most identifying trademarks is his now legendary snakeskin guitar, which was prominently featured when Ratt was in heavy video rotation during the early days of MTV. At the time, it prompted many young players (including one of our writers) to attempt applying snakeskin to their own guitars (we certainly hope no snakes were harmed in the attempt). With this year’s introduction of the Charvel Warren DeMartini Dinky Snake, you can put the faux snakeskin away — now it’s possible to own the “real deal!”

Besides its stunning serpentine looks, this is premium Charvel stuff. The guitar plays like a dream and has an instantly recognizable tone, especially when played through classic EL34-based amps. Additionally, the guitar sports custom appointments such as an Original Floyd Rose Tremolo, NOS Charvel brass strap buttons, and Schallers tuners. Charvel’s custom shop really outdid themselves when designing this one.

To say we fell in love with this guitar is to engage in understatement. There was little not to like — great tone and playability went hand-in-hand, though we would have preferred a noiseless single-coil pickup at the neck. And we can’t understate how many people used the guitar as a conversation starter with us the one night we took it out to a live gig. Guys thought the guitar was cool, and (more importantly) women thought we were cool. Now that’s rock n’ roll! Our only true disappoint with the instrument? Having to return the guitar, of course!