in fact, i don't know how to fix scratches on the wheel.. there are still scratches. But, if you clean it thoroughly, the scratches will be less obvious to see.
depends how dirty... i don't recommend 萬潔零 overnight, it may erode the plastic..... soap should be alright for overnight... in fact, if you use toothbrush with 萬潔零 , for 2 or 3 minutes, .. 99% of oil and dirty will come off. no need to wait over night...