PSA: Steal a Standard Case in For Sale - Wanted to Buy - PIF - eBay & Other PSAs Posted 12 hours ago I do not have any cases with 45 year old foam. How does that hold up over the years? Are all of them going to get crumbly one day? A banjo case of mine from the 70s is made of sort of particle board type of material that disintegrated around the hinge screws. A 50s archtop guitar case that was mine for a while was lined with brown felt with a little padding that did not feel like foam.