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Author Topic: painting fairing  (Read 838 times)

Offline steven m

  • Lives in Foothills of Mt. Olympus
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painting fairing
« on: November 21, 2013, 11:15:42 PM »
In a project that has taken way too long, I have finally filled the off-center instrument holes and out of alignment windscreen holes on my somewhat rare fiberglass 90S Wudo fairing.  Since the PO didn't prime before painting it was pretty easy to clean it all off down to the gel coat.  So, after doing research online, it isn't clear to me at all what kind of primer to use before painting and whether or not the gel coat should be sanded.  Common sense tells me to rough it up and use a sand-able primer until it is smooth and ready for color.  I will most likely have it painted by an expert instead of screwing it up myself.  Any suggestions out there?
Thanks
Steve

Offline montmil

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Re: painting fairing
« Reply #1 on: November 22, 2013, 09:46:53 AM »
I'll share some details of my work in fitting a windscreen/fairing to 'ol Bengt Phorqs R90 and perhaps address a few of your concerns.

I encourage everyone that plans to paint a fairing, tank, fenders, car, whatever... do not buy your products from a big box store. Trade with a legit body shop supplier and explain what you want to do. Listen to them. They know their business.

An example is that crap glazing putty sold alongside LED license plate frames. There is a difference. The cheap stuff is notorious for bond failure after priming and paint. Also, there are specific primers for flex objects -like your fairing- and flex additives for paint. Pay a little more and do the job only once.

After removing the paint from your Wudo and exposing the gelcoat, yes, sand it. I used a 320 grit wet with a soft sanding block. Try not to sand without a block of some sort as fingers can actually cut grooves in the substrate if aggressively over-worked. Just clean the gelcoat in prep for multiple coats of sandable primer. Avoid sanding through the gel coat and exposing raw f'glas fabric. That'll create more work.

Should there be any deep scratches, fill with glazing putty and re-sand prior to prime.

Follow the required reduction of the primer and paint. Reducers are available for various ambient temperatures. Again, the body shop supplier will be able to steer you to the correct reducer for your project.

Mike's fairing and screen have been matched. The lower is ready for gel coat sanding.



Most primers are to be sanded dry. Prepare for the mess and wear a respirator. When your paper clogs up, throw it away and get a fresh sheet. You're wasting time and reducing the quality of finish by being overly frugal with sandpaper.

I shot three coats of primer, sanding each one with 320 grit dry. Pick up a package of tack cloth rags while you're buying paint supplies. Blow off the dust, then lightly run the tack cloth over the fairing.

There are dark and light colored primers. Pick one based on your fairing color choice. Also, light colors permit easier viewing of tiny pits that may have escaped the glazing putty.



Ninety percent of the work in a great paint job is done before shooting color. I find the color work to be sorta anti-climatic after investing the time and energy in all the prep work. But is is way cool seeing the results. Plus, Mike bought the beer.



Bottom line... There's no black magic involved. Just avoid rattle can jobs on a fairing project. A proper compressor, gun and cleanliness will pay huge dividends in quality work you'll be proud to say, "I did it".

I have painted cars, motorcycles and two aircraft. You have to start somewhere and your fairing sounds like the perfect job. Really small stuff and, sometimes, big stuff can be challenging to the novice. Go for it. Last thought... Don't worry about a small sag or a bug landing on wet paint. Color sanding -that's wet sanding the paint- cures many flaws.
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline steven m

  • Lives in Foothills of Mt. Olympus
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  • Posts: 237
  • It seemed like a good idea at the time...
Re: painting fairing
« Reply #2 on: November 22, 2013, 12:11:56 PM »
Thanks Monte!  Off to prime and sand I go, that is after measuring and taping off the fairing to align the instrument and windscreen holes.  I think the PO must have had a couple of beers before he started drilling, or he was in a hurry, or he had bad light in his shop, or all of the above.