If you have to leave it a day before you polish it, I'd definatly wash the car again befoe you polish it. Otherwise you may wind up polishing surface debris back into the paint. ← Yeah im juist talking over night. I only finished polishing it around 6 tonight. Its in a garage and I'll wax it first thing tomorrow. I was just too knackered to anymore today. Was painting rotors and calipers and yeah giving it a good clean.