Yes you can clay your window, your window is a lot tougher than your clear coat. Personally I use 0000 steel wool and Klasse AIO for windows.

If you want a nice cheap clay bar, Claymagic is available OTC at AUTOZONE, its about 10 bucks for a bar and lube. I dont think you can beat that price.

There are places online where they sell the claybar alone, but its going to cost you more than the CM kit.

 

clay bared my old rsx that was black.... only hint i give you... MAKE SURE U HAVE DETAILING SPRAY TO KEEP THE SURFACE WELL WET... or your clay will be next to your foot lol. but neway, ya on black it worked amazing, i did my s2000 but it is silverstone so you couldnt notice it as much, but DAMN did you feel the difference. I <3 Clay

 

You will also marr the paint if you dont lubricate well

 

werd, keep it wet

 

Have had good results using my older clay on the windshield. The clay Magic IMO is not a bad choice.

 

Old clay works well on cleaning wheels - I use Griot's and its $19.99 for an 8 oz bar. Try www.griotsgarage.com