When you guys weld up your 4130 airframes do you use any type of rust
inhibitor in the tubes? I have read about some that you spray in the tubes
ait crawls up the walls to coat the whole inside, and it is supppose to leak
out of any weldment that had a pinhole in it. I am just curious if you use
anything like this or not. Thanks!

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Have a good one!

Steve
www.americanspiritppc.com