I recently used Zaino's polish. It is a synthetic polish that last about 9 months. WOW this stuff is amazing. I applied it to my Tucson and was blow away. Today I just did the wife's 07 Elantra and it looks like it just rolled out off the showroom floor. I have never seen a polish or wax have this affect on Clear coat paint. I am sold for life! I think you can only buy it direct from Zaino. It wasn't cheap but well work it.