koch chemie colourlock leather colour aston martin lederstandardfarbe Felgen & Reifen Versiegelung Rain streaks are caused by

Rain streaks are caused by a physico-chemical process: rainwater picks up calcium

because grip is what counts

Fluid Leather or the Leather Care Sets (Chevrolet) are more economical

Less is more: a thin film is more effective than a thick layer that dries on the surface and becomes streaky

Whether you run it by machine or work it by hand

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