"HK" wrote in message
. ..
Short Wave Sportfishing wrote:
On Mon, 29 Oct 2007 09:41:03 -0400, "Eisboch" wrote:

There is a school of thought that suggests that "beading" of water on a
painted surface will cause paint damage unless you wash and wax very
regularly. The beads of water act like miniature magnifying glasses,
focusing and intensifying the sun's energy, burning through the wax and
paint and permanently burning any dust or dirt into the surface. The
wax is sacrificial and does not last very long.

File this under learn something new everyday.

I just read Wayne's post about sheeting water on his racer and your
post on optics.

Here's my question - what makes the water bead? Is it that it clings
to the surface, or because it can't cling to the surface?



Hydrophobic interaction.

Yup. There is quite a science associated with this. We built high vacuum
processing systems that ionized gas (plasma) and bombarded the internal
walls of bottles -- plastic and glass -- with energetic ions. The process
super cleaned the surface and water would sheet, rather than bead.

Some well know beer companies use this technology.

Eisboch

Makes for very sanitary