If you see some vintage photos of the Monkeys that show Peter Tork wearing a belt, you will see something that has certainly been wrongly attributed to 60's pop fashion. His belt is buckled with a huge buckle that is rotated far around to the side. It was not a fashion statement. Peter did this to protect his bass. What I do is go without a belt (at the risk ...) or if I must have one on, I use a braided belt I found that has all leather covered hardware so there is no bare metal. I don't know where to get one because this one I picked up in a vintage clothing store, but someone told me that women's belts are made this way. And I'm thinking, OK, so I'm wearing a woman's belt???
Another thing to watch for if you wear jeans is the rivets. I have recently gone to painter or carpenter style jeans that have no rivets. The rivets are small and sneaky but can put some bad scratches on a glossy finish.