How to remove mold/musty smell?

[DeWayne Hayes]

Though I make my own holsters, I recently grabbed a nice Ted Blocker duty holster off eBay - these sell for about $260 new; I got this one for $24!  After I re-did the edge painting and used some Fiebing's Atom balm/wax on it, the holster could pass for new. 

Unfortunately, it was definitely used by a policeman, and it has a musty smell that I'm guessing is patrol car. Almost like a musty gym locker, or a musty old book. The smell actually clings to the gun too. 

I tried "bathing" the holster overnight in cedar shavings and that helped some. But the cedar smells wears off fairly quickly, leaving the musty smell. 

Does anyone have any tips for actually exorcising the holster of this squad car funk? I'm especially sensitive to off smells, so it's a bit of a buzz kill. 

Thanks,

DeWayne