Hope you have success with the restoration. To rust blue the barrels, in my humble opinion, will hide a very nice damascus figure and do the gun no favours.(Or do you mean re-etch & rust brown )
From your photos I notice that there is still some chequering on the stock & fore-end, its surprising the amount of crud you can remove from that with an old toothbrush and some meths. Sometimes a total wood refinish on an old gun just doesnt look right, to me anyway. Would love to see some pics when you get it fixed up.
