Our metallic-black car is 7 years old and the paint has already suffered a little, because we so far no garage. Even the shampoo has stubborn dirt away. Resin stains we have dealt with the dough, also goes very well with a little patience. The polish will require a little effort (we polished by hand), but the result is impressive real! The wax has been the easy part and gave the final touch. Although some strength and time is needed, we would use this set again. Conclusion: Before the paint was dull and had stains / streaks of "cheap" polishes, now the Black shines again and the metallic coating is visible again!