The wonderful Isaac Haines # 81 in Shumway's RCA Vol I is supposed to be a light color, and barrel and lock left in white. George described it as in pristine condition. Yes, the Ed Marshall rifle is fairly light, perhaps a light coat of nitric acid. Here's a rifle from Jack Brooks a few years back, finished in light color, which Eric K also likes to use from time to time. There are quite a few examples if you keep looking. Bob
(https://i.ibb.co/BrQcBNm/CS-schim-full-lock-email.jpg) (https://ibb.co/4YXKpdc)
(https://i.ibb.co/8jVv3tV/CS-schim-top-left-email.jpg) (https://ibb.co/mH7Zsg7)