Im going to go look at your Tut over there Duti , I used Dura coat on that S&W because it was all i had.
A lot of these pistols have hit the market ,i cant remember the model# because it isnt on the gun ,but they are in 44Spl ,and 38 Spl ,with a 4 inch barrel.
They are an ,N , Frame ,and are in excellent shape except the finish.
Guys are picking them up for $120.00 ,and i am going to try your cold blue ideas on one and see how it does.