Rust 911 or evaporust
I have a container of "rust 911" that i have just used a couple of times. It has turned black and i am wondering if i can add new product to this used stuff or is the black used product going to spoil the new batch? Also what steps are needed to paint the derusted part? Do you have to wash it in water, or kerosene, or paint thinner or what? Jack
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