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Old Jan 17, 2006, 03:28 PM
hul
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Switzerland
Joined Mar 2003
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Question
What filler for glassed balsa parts?

what is the best (lightest) filler to fill the weave of glassed balsa?
I currently use grey automotive spray-on filler, but it is heavy. Light weight filler can't be painted without priming it again. Any other options?

Thanks, Hans
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Old Jan 17, 2006, 04:42 PM
Reduce the drama...
rick.benjamin's Avatar
USA, OR, Damascus
Joined Apr 2004
4,044 Posts
Polyurethane mixed w baby powder. dry. sand. do it again.
Fun!
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Old Jan 17, 2006, 10:09 PM
hul
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Switzerland
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baby powder feels oily/greasy. That doesn't cause problems?

Thanks, Hans
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Old Jan 18, 2006, 03:32 AM
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Singapore
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758 Posts
West Systems Microlight filler with any epoxy resin... light as balsa dust and sands like balsa.

Shane
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Old Jan 18, 2006, 10:45 AM
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i have good luck useing bondo spot putty the red stuff mixed/thinned with thinner brush it on the primmed surface. drys real fast and it easy to sand and weighs hardly nothing. its and automotive product for small dent scratches the reason i thin it its easy to brush on
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Old Jan 18, 2006, 12:29 PM
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East Anglia, UK
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I use eiher spray on filler primer, or epoxy thinned with microballoons.
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Old Jan 18, 2006, 03:48 PM
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West Systems Microlight mixed with epoxy, is about the lightest, easyest to sand filler I have tried. I still have to prime after sanding it though or I get pinholes when I paint.
Its hard to beat the sandable rattlecan primers.
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Old Jan 19, 2006, 04:09 PM
hul
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Switzerland
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thanks guys.
The rattle can filler primer is the same stuff I used. I'll give the others a go for my next build.

Hans
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Old Jan 20, 2006, 05:54 PM
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United States, MI, Monroe
Joined Mar 2000
817 Posts
dry wall

The best stuff I have found is dry wall spakle, Just take some and water it down till you have a wet paste . Then take your finger and rub it in till it is coverd with this white paste. Let dry and sand. Then prime, sand, and then paint
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Old Jan 20, 2006, 07:12 PM
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kevin good idea light weight and simple the lighter you build them the better they fly
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Old Jan 27, 2006, 04:02 AM
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Farnborough, Hampshire, UK
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'Stopper' it's an automotive filler, very light, quick drying and designed specifically for filling small scratches, and small holes left after sanding normal filler down. Used it on my last glassed plane, along with Klass Kote paint and the result is
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