While nosing around a gunshop the other day, I found a model 94 that was in good shape, but there was handling/surface rust on the receiver. I know it could be steel wooled off and touch up reblued. However, I was wondering, could the blueing be stripped from the receiver, and color case hardened? I am no smith, and I wonder what it would cost? I have always liked the old guns with the case hardening done. Anybody got any thoughts or ideas?