If this is a trapper model (6254 SS?), there's no easy way to remove & re-install the scales, without some significant knifemaking/knife repair skills. The scales are pinned on (likely glued/epoxied too).
Also, I'm a little perplexed about the rust on the 'stainless knife'? What is the pattern number on the blade tang? Assuming a trapper with jigged bone/wood scales, and depending on the vintage, it'll likely be '6254 SS' (stainless model), '6254' or '6254 CV'. The latter two are both non-stainless, for the blades anyway, and possibly the springs on the older models.