Originally Posted by
WD40 View Post
Am I the only one?
Washed the Crossfire yesterday and dried it 98% of the way using a really
lightweight leaf blower. It removes water from behind emblems and anywhere/everywhere water can normally hide. Also it allows me to dry the entire car while standing upright, something I appreciate more & more the older I get! Especially if you use a ceramic coating instead of wax the water simply "runs away from" the 150mph airstream. And BTW if you have not yet switched from wax to ceramic then you are really living in the past. It's superior in every way. Much, much longer lasting plus goes on & comes off so much easier. I use TheLastCoat.com.
They include a coupon when you receive your order that you mail to the company and they "double your order" by mailing you another 8oz bottle. It works just as well as any other ceramic I've used but you get more and it costs less. "Ceramic" means SiO2 and chemistry is chemistry, so it doesn't make sense to pay more for the same thing. I had 7
college chemistry classes, so I shake my head and smile at people who pay more for expensive table salt.
(End of quote)
Never one to have deep thoughts, I didn’t concern myself as to why “water spots” are so bothersome..... until I read WD40’s above entry where he explains that Chemistry can explain a lot. So I googled “bothersome water spots” and got this:
“Imagine a bead sitting on paint. Because of the bead’s spherical shape, less water is present on the edges of the bead. Evaporation rate increases where less water is present, so the outer contact line of the bead evaporates first. That’s where things start to get interesting.
Because the bead’s contact line is static, as water disappears, water from the rest of the bead rushes to the edge to take its place and maintain the contact angle. That rush of water takes mineral content along with it, causing it to accumulate at the edges. Once the water is gone, UV radiation causes that remaining residue to bond chemically with the paint. With this, the process is complete—you’ve got a water spot.
Oddly enough, this exact same process is what causes a coffee stain to occur. Just sub out mineral content for coffee bean particles.”
Well, ...........my question to WD40 is, “What is actually happening that makes this bonding occur” ?