All good replies above. If you have a rarely used, pristine condition 1911 (safe queen, etc.) that you wish to preserve in pristine condition and shoot occasionally, use tape (but it is a hassle).
Otherwise, brass chips are generally part and parcel of the 1911 experience.
Don't be alarmed! Armor Tuff is basically like paint and will show wear VERY quickly if used. Send it off to Metaloy Industries and have them Hard Chrome the gun and NEVER look back at all your rub marks and scratches!
At the risk of being snarked at, I agree. The fact that there are much less expensive, reliable guns out there that don't leave brass kisses, I'd expect that from a Wilson.I've had a number of Wilson firearms in AT and virtually all of them showed finish destruction behind the ejection port. Despite the semi-snarky remarks telling me to "man up" I've always felt that this was not acceptable, especially because my other guns ("lesser" brands not costing $3000 plus) do not evidence this wear and I shoot them plenty. Because of the "kisses" issue, my current Wilson is stainless.