"JB" wrote in message
...

"Gary Smith" wrote in message
...
Hi, i have a 2/70 verticle that is "chalking" on the outside of the
white section. I think this is the right term for it. If you grab it
white powdery remnants stay on your hands or clothes. How do you go
about fixing this? Wash with soap and water then spray enamel on it
maybe?

Thanks for any input...

Gary
VK3LCD

UV deterioration. Sand and use white Acrylic enamel. I have used it on
masts and Coax too. I have used other light Satin colors for camo effect
with no harm. Darker pigments may detune.

Actually white acrylic enamel can have more of an effect than you might
think. It is because titanium dioxide pigment is used to achieve the white
color. Depending on the anatase/rutile ratio, the dielectric constant of
titanium dioxide can range from 80 to 110. That of the acrylic paint
without pigment typically is around 3.4. Other pigments can also have an
effect, but avoid any paint containing metallic particles.

I suggest using something like Crystal Clear Krylon® or similar products.
By the way, acrylic paint has excellent ultraviolet resistance.

73, Dr. Barry L. Ornitz WA4VZQ