Check out "The complete book of the model 1911" magazine ("from the publishers of Guns & Ammo) at your local book store..
In the article "Abusing the 1911s for fun" they tested a Wilson CQB, Kimber Warrior, Charles Daly, and a Rock Island Armory..
They degreased them, stripped them, scrubbed them with alcohol, and then sprayed with 1,1,1 Trichlorethane. Baked them in the sun and shot 100 rounds as fast as possible without a single problem..
They buried them in the dirt, dug a hole and threw them in, after digging them back out, racked the slide and shot another 100 rounds with no problems..
5 gal bucket full of dirt, shaken, 100 rounds, no problems...
Next, dig a hole, submerge in mud and silt,shovel on more mud, same thing (although trigger pull got harder...Kimber required two fingers on the trigger to pull it)
Next Talcum powder and sugar in a bucket, another 100 rounds with no problems..
Parked his truck on top of the guns...No problems..
Underwater (do not try this at home!!) RIA cycled about 1/2 the time, Kimber and Wilson about 1/3 of the time.
Hollow points underwater caused a barrel to buldge, but he didn't say which one...(He did say even with the buldge in the barrel the gun still works just fine.)
Even after all that, there was no problems with the RIA