“Robert, the main ingredient in Rain-X is alcohol. It also contains Acetone, which I would not recommend using on automotive paint surfaces.”
Ok, I’ll qualify myself.
I attend General Motors
Training Center Fisher Body School in 1970, 1971 and 1972 where I earned certifications in reconditioning, new car prep, auto body repair and paint refinishing, frame straightening, interior repair, convertible top and sunroof repair, etc.
I practiced auto repair and painting for five years and owned and operated several detailing and reconditioning businesses including mobile service and operating out of both domestic and import dealerships brands included Chrysler, Dodge, Chevy, AMC, Porsche, Audi, Alfa Romeo, Lotus, Rolls Royce and MG.
I’ve also owned and operated professional carwash and express oil change.
I also have ten years experience as environmental program manager where part of my responsibilities included regulation of the production, storage and transportation of volatile organic compounds. This included products such as gasoline, diesel fuel, bunker oil and wide range of solvents.
I know what I’m talking about.
Acetone is a solvent and has been used in applying coatings such as highway traffic paint. Along time ago it was also used to clean marks off the varnish of bowling pins.
Acetone has been used by highway departments and auto body shops to safely remove highway traffic paint from vehicles.
The content of acetone in Rain-X is just enough to make it effective in removing sap.