Blueing an old Win model 70 (1976) (Hot Caustic)

SkytopBrewster

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I know the pre-64 model 94s would not take blueing, how do the older mod 70s take to hot caustic, have not done one yet and buddy has one to get done.
 
Pre-64 Model 94's blue just fine... it is the post-64 Model 94's that do not blue.

Old and new Model 70's blue just fine. Neither are a post -64 model 94.
 
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