The water spot remover from Chemical Guys took off ancient hard water spots on an old car I had that I cleaned up before I sold. I had tried everything you just mentioned and steel wool, only the water spot remover worked. Wear eye protection and a mask if you use it...it smells horrendous.
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09' E92 M3 / Jerez Black / Black / Carbon Leather Trim / Technology / Premium / 19" Wheels / DCT / Enhanced Sound / Sat radio / iPod cable / Smartphone integration / PDC / V1 (Hardwired)/ Black Fuzzy Dice / (Delivered 4/17/09)
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