Using a Trad will not degrade condition it you put the time in. After 17 years my Roadster is little different to when it was three years old. But after a Highland trip, for example, it needs a bottom up clean, including the inside of the wheels and underbonnet. Interiors need leather cleaner and conditioner, and localised re-colouring where use affects the dye, but really its no problem if you want to keep the condition good.
