Are there any other products out there which gives a good shine and protects which is not a pain in the ar*e to apply and even more so a pain in the ar*e to polish up without streaks and residue? just spent 8 (yes 8) hours polishing up the bonnet boot and roof of an s-type jag (zpc fusion and z5)and it still looks streaky . I have used the zaino detailer z6 between and after coats and there is still residue. To top it off - the zpc accelerator which is less than 12 months old and kept in a dark cool place with the lid tightly closed has turned to jelly.