Thanks for the compliments on the photo Jack. If it turned out arty I can assure you it's totally accidental. I'm afraid creativity is not one of my strong points!
I'm interested to see if anyone sees a problem with dunking the barrel in the electrolysis bath. I'm thinking the bore won't be affected because it was still oiled up and there is zero rust in there. I thought that electrolysis only worked on rusted surfaces???
New rings would be easy. Do you know where I might be able to buy some?