junker Posted February 11, 2010 Share Posted February 11, 2010 my mentor told me i need rust-powder mixed in with my flux to make sure there are no leech lines (those white lines along alot of forgewelds). so i went to my auto shop teacher and asked if i could clean out metal powder buildup from the brake rotor/drum cutting machine. can i just use this as is, or do i need to let it turn into rust powder? Quote Link to comment Share on other sites More sharing options...
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