I tried simple green on my tires, and even let it sit, all that! my question is what if i used a electric pressure washer would it blast off rubber still, like a gas one might (as i immagined)? or be just enough power to blast off grease? if youve got an old tire & an electric pressure washer, maybe you could try it and let me know if those electric pressure washers are actually worth a s***. Thanks!