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UDS- blue on inside

post #1 of 7
Thread Starter 
Hey guys. Seems like this is the most popular topic but I'm building a UDS with a used unlined barrel. Used a propane torch on the outside. While burning the outside, the inside changed colors and now has a blueish tint. Safe to use or do I need to scrub? You can see where I scrubbed a section off. thanks!
post #2 of 7

Yes, just wipe it all down with low odor mineral spirits and getter built... getter done!   

post #3 of 7

Totally safe to use as-is.

 

In fact, I kind of like that fire blued color.

post #4 of 7
Thread Starter 
Great! Thanks! Assembly is done and am waiting for the paint to dry.
post #5 of 7
Is that blueish tint considered rust inhibitor?
post #6 of 7
Quote:
Originally Posted by Netspec View Post

Is that blueish tint considered rust inhibitor?

It is a thin oxide layer that will inhibit rust, but it is very fragile. Oiling it helps, but in this case it should be seasoned anyway.
post #7 of 7
Sorry, I misread the original question. I thought the barrel in question was a new unlined barrel
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