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Originally Posted by audiboy
I realize that automotive soap cannot perfectly balance the PH levels in any random water sample. It will however, get it close to being the correct balance for automotive paint. This PH level will be a lot closer than a dish soap mixture.
You're probably right, but I can't say for sure since I have never seen or felt a vehicle after a dish soap wash and no other work.
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"This PH level will be a lot closer than dish soap". I dont know, have you used some of these OTC "automotive soaps"? Most are junk.(Kit/Blue coral/Zip Wax just to name a few.
Now I'll tell you my prefered water/soap selection.
Soft water from my home, sent through my DI set up right in to my 90 gallon tank. My soap well I use a brand call "AutoSmart". Wich I might add "claims" to balance the PH levels in "hard water".
Any real detailer will tell you, DI water is the right way, and the only way to wash cars/trucks correctly. Especially in the direct sun. Oh how sweet it is........ DI water is the tickect, hard water you've got to be kiding me, right?