Looks like its time to find some of this stuff. I have been using zymol and meguires #7 show car glaze. The number 7 is very nice product, but does not last too long. I try to seal it with the zymol wax.

Dave I too have noticed the Coopers are not wearing! They get great traction though. I would like to get rid of the 70's and put 60's on. I am having a hard time with tossing brand new tires though. They are prob the only thing I used from the previous owner.