Originally Posted by
wrk101
Tell me more. How many painted frames have you treated with oxalic? What concentration? I have done about 40 frames so far, haven't ruined the paint yet. But I use really dilute oxalic.
But I do not recommend an oxalic acid soak for just a couple of minor spots. Not worth the effort, and there are spot treatments you can use instead.
I've done a few frames and all three ended up with a milky dull finish. I used 2 TSP per gallon of water and soaked overnight. The frames were rinsed with tap water and left to air dry. As far as I'm concerned it should only be used to treat the inner tubes. Lots of others on here have had the same problem with the dull paint issue.
I am going to treat the the inner tube of a frame I have to see how it works out. I have 3 rubber expandable freeze plugs, one for each side of the BB, and one for the lower cup of the Head Tube. I am going to hang the frame level and pour the solution into the seat tube, and head tube until the main frame is full. The stays will be done the same way by blocking the drain holes with small rubber plugs.