They cleaned and oiled it like nothing I have ever done.....bet they use a 'dunk tank' then clean residue after a good soaking. r in s.

In the "old" days when I shot PPC in the revolver only days we used old 50CAL. GI ammo cans with the can holding Hoppes #9 to soak the revolvers -top strap down-....the gun barrel and chambers cleaned with just patchs.....Lewis Lead remover kits were used when the time was short and soaking overnight wasn't a option....good luck and good shooting!