The first product use example is not inherently an off-label use of the product.  I am actually defining an undervalued role it is ideally suited for.

This is a good product to spray on your car and a microfiber towel when you are drying your ceramic coated car.

Water spots are still an issue to many people who are new maintaining their car with a ceramic coating.  Although I do believe the issues (or complaints) of water spotting with coated cars is somewhat misleading.  There is some truth that the makeup of a coated car, in part being extremely hydrophobic, leads to a higher concentration of mineral deposits.  What I find to be THE REAL ISSUE is the consumer who is not knowledgeable or as enthused about cleaning the car coupled with a car that often looks better from the start than what he or she is accustomed to.  To elaborate people who are new to ceramic coatings are often new to paint correction, meaning this may be the best their paint ever looked.  Consequentially new defects or WATER SPOTS on polished paint will stick out like a ‘sore thumb’.  You have a significant number of people misinformed and/or ill-prepared to keep a car in good.  Due to the way these services are often marketed, they interpret less maintenance as minimal maintenance.  Then you factor in probably paying the most or putting in the most work they ever have done for a detail.  You have a recipe for disappointment due to unrealistic expectations.

It does not help that many people do not understand how to remove them, or not all are the same.  Being more knowledgeable about detailing issues, I would much rather deal with water spots on my coated car for two reasons.

Coated cars buy you more time.  Also, the use of specialty cleaners does not significantly strip protection.  Most people do not realize there are grades of water spots.  Often if addressed early enough, the water spots on coated cars are still just topical.

I found this to be a great combination.  Gyeon Bathe and JenKO when I am drying the car.  JenKO is a quick detailer /waterless wash that doubles as a light acidic (for water spots) cleaner.  With coated cars even if you have gone longer without washing with mineral deposit buildup, monthly washing with this routine will usually keep your car looking pristine.

The Gyeon Vinyl Cleaner is another item, which is also nice to have for a quick engine detail.

Formulated for and very good at cleaning interior plastics.  For the same reason, it is also a good reliable product for engine bay touch ups.  Although engine bays have become safer for cleaning, they are not bullet proof and some people are uncomfortable using a hose.  I still use a waterless or rinseless wash approach a majority of the time.  Having this on hand comes is a convenient option, especially when the goal is to make the engine bay in addition to the interior respectable for a trip to the mechanic shop.

Mike Phillips mentioned earlier in my car ownership that a clean engine bay is a sign that you take care of your car and an unconscious message to the staff to be more CAREFUL around your car.  This is advice I have always taken to heart.  It is also advice I share with my clients and friends who care about their cars.

I am bringing a rinseless wash solution to a traditional wash process.

I like to pour DIY Rinseless (1 to 2 ounces) specifically in a rinse bucket to help clean wash mitt.  I can see evidence of it aiding in taking grit away from the wash mitt in the rinse bucket.  Over time I have noticed certain rinseless washes have a positive (cleansing) effect on wash mitt.