Quote:
Originally Posted by gigamanx
Tried your suggestion. I must be doing something wrong. I apply the muriatic acid with a toothbrush so its localized. Seems like its working, but there is still rust and patches of black (I'm assuming that's the wax) I've tried a couple of times and the best result I ended up getting so far is a light wire wheel to get the rust off then hit it with muriatic acid. I dissolve the acid with ammonia to neutralize it. I'm working on little patches to figure out the right combination.
Still not happy with the spotty results I'm getting. Maybe I bought the wrong stuff?
https://www.lowes.com/pd/Jasco-Green...9-538a2e6cad36
You can see in the pic. The middle section had naval jelly for 30 min then wire brush then muriatic acid then ammonia. Seemed to get pretty clean after all that. The other two sections had muriatic acid only as well as the side of the frame. It didn't seem to get through the rust very well.
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I'm interested in this answer as well. I never had a ton of luck with the muriatic acid. I use a combination of wire wheels, sanding discs, and flap wheels until it's as clean as I think it's going to get, then follow that with phosphoric acid...let that sit for 20-30 min (keep it wet), then wipe it off. Seemed to weld OK.