Exceptionally aeromatic and easily wipes away most paints this side of powder coat- including melting away carbon deposits like hot butter... Won't damage most polymers either if briskly wiped on, than wiped right off. I have a small jar of it on my gun cleaning station in the garage and use it on nearly every gun I own in some capacity or another.
So small areas of the rifle with some acetone, then wipe off, then light coat of oil? Any potential to damage the natural finish? Is there even a chance to return to the standard AR black after I decided to paint it?
+1 on Acetone. It will remove most paints, lacquers, or other finishes. Wear some rubber gloves as Acetone can be absorbed through your skin. Due to it's odor and flammability, it isn't the best to do it in your living room. Use it in your garage or outside away from a ignition sorce.
As an alternative to acetone or laq. thinner you might try denatured alcohol. This will work on latex based paints and is not as harsh as the others. As with the others mentioned, ventilation is a must and be aware all are extremely flammable.
Anything strong enough to clean carbon & lead out of the barrel will take Krylon off.
I've used Krylon for other projects & any chemical would lift it.