Wipe Out/Patch out works. I take the part and soak int in Path Out for a day or two, Duracoat wipes off, repeat as needed for stubborn spots. I learned this trick after noticing it was removing the Duracoat from my muzzles after many cleanings. I've done a complete barreled action this way. No doubt there are better and faster ways, but this does work.
Sure does, wipe out does remove duracoat also, plus many other bore cleaners. Let it drip out the end of your barrel on your nice duracoat finish over night and see what happens. I use acetone as its cheap and I have a 4" x 48" stainless tube that I soak barrel actions in.