I thought that it looked PD nice before cleaning! I may be a novice re-learning old bike repair skills but for years I have fooled around with sports car restoration and related labors of love. Golden rule #1 is never use anything abrasive or anything which will leave an unwanted residue of any kind. Personally, I would never use WD40 as a cleaner. Except perhaps applied lightly to a clean cloth to remove surface contamination from the likes of brake calipers. Good ole dishwash detergent is effective but don't soak the Lady like she's taking a foam bath. My wife bought some fantastic cleaner which lifts grease stains off kitchen cabinets. I was very dubious but heck it's a real winner. Product name is Johnson Wax "Jubilee Kitchen Wax and Cleaner" and it's a dynamo! Probably, a dilute and much less abrasive version of auto polishing compound? For chrome, alloy and other metals I use only Solvol Autosol in the gold/black tube - and nothing else. Avoid chrome cleaners in cans like the plague! Way too harsh. For a final polish, regular soft Turtle Wax and a clean cloth is as good as anything. Golden rule #2 is to remember that the paint surface thickness on a regular bike is measured in microns. The likes of steel wool will strip that surface to bare metal in seconds. Pressure washers and steam sprayers are for frames only and should never be used on a complete bike because the liquid will penetrate into unwanted areas such as bearings or even into the frame itself.