Originally Posted by
cuyd
Thanks for answers. I know that Evapo Rust and Frame Saver are great things, but to get enough to cover whole frame would probably exceed the value of frame itself. I don't have tools and containers for electrolysis, but Oxalic acid sounds pretty good. From what I know I should mix powder acid and warm water in 1:10 ratio, then pour it inside frame and wait for around 12 hours, then dilute the acid with mix of water and baking soda and clean the remaining with just water. Am I correct here?
Now, speaking of paint I am unsure what to use, I've heard that 2-ingredient epoxy paint with hardener or 2-ingredient reactive paint with hardener are best primers but those are pricy compared to some anti-rust/corrosion 2in1/3in1/"paint and forget" solutions. Are those mixed paints really that bad, because everywhere where I look people disdain them. Also, would pouring some of such pain inside frame work as anti-corrosion cover? As noted above, I could try linseed oil for that but boiled version also costs alot here. Perhaps linseed varnish would work, I could get it cheaply.
Finally, what about that lead paint which I could get. It's relatively cheap and I could mix it with linseed varnish to create nice priming solution like they did 70 years ago but is it worth possible health hazards?
Oxalic acid is highly toxic. I would not recommend it. A better solution would be phosphoric acid, which actually does a better job making rust inert. Boeshield makes a product called "Rust Free" which works quite well, and there are others on the market that are less expensive.
Do not use lead paint. Find one that has a zinc compound like zinc phosphate. These work very well. Locktite Extend Rust Inhibitor(?) is basically phosphoric acid in an acrylic polymer coating. It's thicker, has to be brushed on, but makes a good primer.