Would acetone clean mercedes vinyl without causing harm?

I have a 5lb bag of critic acid. I only need half that to do the engine cooling system flush. Could the remainder or some of the remainder be use to clean this vinyl? How strong would be recommended to mix critic acid for prepping vinyl to paint?

I'm using the expensive paint and buying a hplv gun to apply it. I just want to do all this correctly and only once.

Suggestions? Recommendations?

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84 300SD
85 380SE
83 528e
95 318ic