Hi and thanks for using 2CarPros. Com.
Living in PA, I experience rust issues all the time. There is no way to repair this to make it safe. The only suggestion I can even give would be to find someone really good at welding and who repairs frames and see if there is a way to weld new metal in place. If there is not, it needs replaced. As I am sure you already know, the lower control arm is extremely important and is not something to take a chance with.
Joe
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Sunday, September 2nd, 2018 AT 8:06 PM