I bought a Uberti Low Wall with beautiful blue but every time I wiped it down my cloth had a reddish residue & no matter what I did, didn't work. Mixed baking soda with water & brought to a boil & plugged the bore and poured it all over barrel. It immediately formed a whitish coating. Left it on about 5 minutes and rinsed with clear boiling water. Did it twice to be sure. Completely neutralized the rust process. Oiled it down & no red on cloth. Blue just as beautiful. Problem solved.
Bob