Evaporust is like magic! The barrel cleaned up beautifully. The bore looks brand new. I doubt this has ever been fired. It does look like someone started a dovetail for the front sight....I may wind up putting flat in the bottom of the stock. Worst case scenario, lose 1 inch off the muzzle, re-crown, and cone. (I was going to cone the muzzle anyway.)
Interestingly enough, Evaporust left a rather pleasing grey finish on the outside of the barrel. I suppose it is only to be expected, after all I have read about antique/French grey finish/Naval Jelly/Clorox, etc., that there should be grey under the rust, but it is a pleasant surprise. I had finally decided on a grey finish for this barrel, and Evaporust gave me a great start! It is splotchy looking of course, the most rusted areas are the darkest, the least rusted the lightest, but I am hoping that enough blue and 0000 will even it out.
Pics to follow.