hey all, i detail cars at my parents Carwash here in Florida and ive worked there about 3 years now.....the most suprising product i have tried is "Spray Nine" believe it or not, it works wonders in cleaning all kindsa junk:
Brake Dust
Road Tar
Cleans Dirt off of Dash, Doors, Console (spray and wipe dont let sit)
Cleans Leather/Vinyl seats (again, do not let sit, it might take color off)

i hope i have helped some of u guys w/ your S2000 cleaning .......if u have any questions feel free to hit me up on AIM.....and **please be careful w/ the spray nine, use it at your own risk**......seeya!