Touch up blueing?

[terc]

Things were a little slow this evening wich led me to the gun safe.I've had an old Fox for a while with a nasty little scrape on the left barrel. I sanded it smooth,then tried to apply some blueing on the spot. IT won't take the color. Just when I think it is blended in and all is finally ok I rub on the oil and off comes the blue.
The barrels are chromox.What type of touch blueing works on these barrels?
Thanks Dave

[Twice Barrel]

This is some mighty good stuff but you may need to do a complete rust blue
on these barrels.

http://www.brownells.com/.aspx/pid=1072 ... _BLUE_reg_

[Dan Rossiter]

Blueing touch up can be a pain and it never really matches in the end. At least that is my experience with cold blue. One thing is certain only rust blueing will match rust blueing.

[terc]

Thanks for the Oxpho-blue recomendations. It was the only cold blue out of three that did not rub off. The touch up isn't perfect but it's not bad.
Thanks again, Dave