Colt police positive target, to reblue or not?

[Shadyduk1979]

I have a Police positive target that is a great practice gun or for taking out new shooters. I have been thinking of trying to give it a cold blue at home, but i don't want to ruin collector value. The gun is already bubba'd, somebody removed the adjustable sight. If the value is gone as i suspect, ill try my hand at re bluing it. What say you?

[dfariswheel]

You will almost certainly not be pleased with cold blue.
It's not at all durable, and can be wiped off with a fast rub with your thumb.
It tends to cause rust, and turns brown.
Guns often end up with a smoky looking, streaked gray-blue color.

Cold blue, even the best of them like Brownell's Oxpho-Blue are intended for touch-up of small scratches.

Personally, I'd keep a coat of lube on it to prevent rust and use it as-is.

[azasadny]

Either keep it as is or have a professional re-blue it. Don't make it worse...