Refinishing the wheels isn't the answer. The OE brake pads are the problem. The OE brake pads have a high metallic content and the hot brake dust (and metal content) coming off of the brake pads builds up in the corner of the spokes on the front side of the wheel over time. The fix is to put some elbow grease and claybar in to cleaning it and switch a brake pad like Hawk that uses less metal and more carbon. I can tell you that i have personally cleaned the ISF wheels with claybar with great success. I'm pretty sure Lexus will listen if we offer helpful suggestions rather than sue them.