First off, I don't use dish soap to wash the car every time. You wash plastic food containers with Dawn, don't you?? One wash with Dawn to de-wax and de-grease the car is NOT going to ruin the plastic moldings.

As I clearly stated in my original post, this is a one-time wash with Dawn, not a regular occurence. And you'd be an idiot to use any citrus-based product on your finish. It's called citric ACID for a reason. I won't use citrus products to clean my wood furniture (dries it out), and I won't use it to clean my paint either.
Second, I know the clay bar will not remove all contaminants. There are a number of spots I'll be using rubbing compound and polishing compound.
Third, the car has not been painted yet. That is 1-2 years in the future. And just because you find a product in the auto-parts store does NOT implicitly imply that it was developed specifically for a car's finish. I merely stated that the clay had properties that reminded me of another product. It is quite possible that it is the same material, just marketed differently. Just because a product is on the shelf at the parts store for $15 doesn't make it better than a $5 art eraser
if they are in fact the same material. Spending $10 more every time you purchase a product just because it's specifically labeled as "automotive use" is idiotic at best

. Some of us have to actually save money and budget for the $1000 paint job. I merely posited a possibility that I think is worth exploring further. If the art eraser won't work, then it won't. If it does, then we have a convenient money-saving alternative

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Answer to your question - If you'd read the post closely, you'd see that I said I wand-wash at the car wash. That's the way I washed, and that's the way I waxed. Not the best way, but in the past I was less concerned about my car's finish. I now have a new outlook, and will be doing it the more labor-intensive way.
Try not to be so quick to judge noob.