Ok, lemmie break it down for ya. Dawn = Bad. Any dish detergent = Bad. Dawn removes grease and oil, and is damned good at it. Dawn will also remove the oils from your paint. It will cause premature clear coat failure. Will that failure be tomorrow? No. Will it be next week? No. It will be years down the road. Using it once or twice before a full detail probably won't hurt much. Unfortunately, someone without detailing acumen will skim through, read that Dawn is good and use it every wash.
I only use claybar for sap and I will only use it with spray wax after a quick wash. you must wax after clay bar as the finish will not be the same where you did not use the bar. As far as which clay bar to use depends on how much grit you need to take off the contaminates that are locked on to your paint.
Don't use it with spray wax. Only use it with a Quick Detailer type product. You're introducing wax into a place where you want something removed. Wax doesn't remove anything. The clay bar will pick up the wax you just sprayed. If you MUST do it your way, at least respray the wax per direction after you've clayed the area. Then you will have the protection you desire.
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