I've always kept my Mustang very clean, never driven it in the rain in the two years since I have done most of the resto, and washed it fairly regularly.
I have done a clay treatment on other cars before, but those were in obvious need and had a lot of contaminants that needed to be removed. I never really thought about doing the Mustang because it has always been kept clean and the paint was farily smooth - but I had some clay and time to kill, so I went ahead and did it. Holy cow, I could not believe how much crud was pulled off what I thought was a very clean car. The shot below is just from doing half of the roof - and keep in mind this was a car I had just washed.
http://img227.imageshack.us/img227/8760/clay2kx8.jpg
I finished the treatment up with a polish and wax, and it's unbelievable how smooth the paint is now. If you have never clayed a car, I suggest giving it a shot. For those who have never heard of claying, Autopia has a good write up.
I have done a clay treatment on other cars before, but those were in obvious need and had a lot of contaminants that needed to be removed. I never really thought about doing the Mustang because it has always been kept clean and the paint was farily smooth - but I had some clay and time to kill, so I went ahead and did it. Holy cow, I could not believe how much crud was pulled off what I thought was a very clean car. The shot below is just from doing half of the roof - and keep in mind this was a car I had just washed.
http://img227.imageshack.us/img227/8760/clay2kx8.jpg
I finished the treatment up with a polish and wax, and it's unbelievable how smooth the paint is now. If you have never clayed a car, I suggest giving it a shot. For those who have never heard of claying, Autopia has a good write up.