[TowerTalk] Fiberglass life expectancy
Roger (K8RI) on TT
K8RI-on-TowerTalk at tm.net
Mon Jul 31 22:34:12 EDT 2017
HVLP spraying is fairly efficient, but there is a learning curve and the
initial portion of the curve can be high waste. Depending on the
equipment, cleanup can be a royal PITA. Inexpensive equipment may have
plastic parts that are vulnerable to paint thinners as benign as Mineral
Spirits) even though most paint requires little thinner when used in
Personally I don't like the results with rollers on tubes and much
prefer the HVLP, EXCEPT being inherently lazy, I really dislike the cleanup.
73, Roger (K8RI)
On 7/30/2017 Sunday 3:23 PM, Patrick Greenlee wrote:
> Petit's Shipendec and Z*Spar products are enamels, mostly in a
> traditional fashion (petroleum distillate vehicle, pigments and
> traditional oils). Their Easypoxy is a single part polyurethane. They
> now have a relatively new product, which is a two part polyurethane
> (LPU) called EZpoxy2. This is as you might expect an LPU, with bits of
> the bisphenyl A molecule included, so they can call it an epoxy. It's
> not a true epoxy, but a modified polyurethane, but is a good product.
> (LPU is linear polyurethane.)
> Woosley is another good name in marine paint. You can Google on
> marine paint and find plenty of info. You don't need to get into the
> hassle of the more traditional catalyzed epoxies. Whatever paint you
> choose go with the maker's recommendations for prep and primer( if
> Spraying can be wasteful. A good properly sized roller with correct
> knap and a brush for those difficult to roll spots is low tech, high
> reliability and thrifty man, thrifty. Depending on your spray
> equipment, expertise/skill and work piece configuration it is easy to
> waste 1/2 the paint spraying.
> Patrick NJ5G
> On 7/30/2017 9:59 AM, Rudy Bakalov via TowerTalk wrote:
>> The plan is to buy fiberglass tubes from MGS4U, a site selling to
>> hams, and apply my own primer and paint. They claim their fiberglass
>> already has the UV additives.
>> The idea is to have a X arms support for wire antennas on top of my
>> 95' tower. The QTH is VE3 with -20F cold winters and 90F sunny summers.
>> Can you recommend specific marine grade primer and paint?
>> Rudy N2WQ
>> Sent using a tiny keyboard. Please excuse brevity, typos, or
>> inappropriate autocorrect.
>>> On Jul 30, 2017, at 9:05 AM, Patrick Greenlee
>>> <patrick_g at windstream.net> wrote:
>>> Not all fiberglass (AKA GRP Glass Reinforced Plastic) is created
>>> equal. Some is made with Acrylic resins, some with various epoxy
>>> resins and so forth. Some have UV stabilizer(s) in the mix and some
>>> don't. Comparing anecdotal "evidence" of environmental robustness is
>>> essentially futile unless the nitty gritty of the chemistry is also
>>> known. It is like saying, I have a bag of stuff and it is pretty
>>> heavy and when exposed to the weather in Minot, ND during a really
>>> cold winter it didn't catch fire. Now compare that to your bag of
>>> stuff in a meaningful way.
>>> Painting fiberglass? Is it contaminated with mold release? If yes,
>>> then what kind, silicone, water soluble, or what. Many variables to
>>> consider when painting fiberglass. Clean is good. Lightly abraded to
>>> foster tooth is good. Well proven coatings successfully employed on
>>> fiberglass boats with exposure to sunlight and foot traffic are good
>>> candidates for fiberglass coatings exposed to the weather in many
>>> ham applications.
>>> Patrick NJ5G
>>>> On 7/30/2017 12:41 AM, Wes Stewart wrote:
>>>> I was thinking about building an LPD antenna and purchased some
>>>> Strongwell 2" square fiberglass tubing about 7 years ago. I never
>>>> finished the project and the tubing has been kicking around the
>>>> yard in the AZ sun since then. I see no signs of degradation and
>>>> it had no treatment whatsoever.
>>>> Contrast that to the fiberglass military mast sections that turn to
>>>> hazardous waste in a year or so.
>>>> Wes N7WS
>>>>> On 7/28/2017 6:27 PM, Rudy Bakalov via TowerTalk wrote:
>>>>> Hi folks,
>>>>> Does anyone have first hand experience to share? What can I expect
>>>>> from primed and painted UV resistant fiberglass?
>>>>> Rudy N2WQ
>>>>> Sent using a tiny keyboard. Please excuse brevity, typos, or
>>>>> inappropriate autocorrect.
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