From the minute I decided to buy an S2000 back in September, I did some internet research on how to take care of a convertible, since I had never owned one before.
I found three products that really help

Plexus, Tequipment convertible top shampoo, and Tequipment convertible top conditioner.

Here's where I found the details...

http://www.autopia-carcare.com/cabriotopcare.html

Lots of other useful info here...
http://www.autopia-carcare.com/

Here's where I bought the products. I highly recommend them. The guy on the phone was really nice, and I received the order in about three days.

http://www.autofanatics.com/carcarecorner1.html

~Dave

http://www.gnt.net/~dvj/s2k/