Choice of cold blue formula

[longcruise]

I'm in the process of cleaning up and reconditioning my GPR. The metal has previously been finished with birchwood casey plum brown but I'm going to a cold blue finish this time around (not looking for browning suggestions).

What, in your collective experience is the better cold blue formula?

[Scota4570]

I buy Brownells  Dichphan by the quart.  Do not over polish, I lightly sandblast.  Apply with green scotchbrite.  When the color evens out apply more with clean cotton.  Burnish with steel wool and more dichphan.  Oil.

[Shovelbuck]

I've used Birchwood Casey cold blue liquid for ever. Great success as long as you are meticulous cleaning the parts to be blued. I do a minimum of 4 coats, usually 6.

[elk killer]

Brownells Oxpho Blue, apply a couple of coats, then pour boiling water over the part, then apply oil while it warm, works great

[Waksupi]

Rust blue is so easy and durable, why not go that route?

[FDR]

 Birchwood Casey Plum Brown will turn blue if boiled!

Fred

[longcruise]

I did a test on the underside of the barrel and didn't like it.  Decided to polish all the parts out and stay "in the white".   Kinda looking forward to watching it age.

[Daryl]

Birchwood Casey Plum Brown will turn blue if boiled!

Fred

Never would have thought of that, Fred. Thanks for bringing that up.