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Old 05-01-2007, 12:49 PM   #1
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Bondo and balsa

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Curious, I am doing some detailing on my Waco. Has anyone ever used automotive body fillers with balsa? Does it work good? Sticks to the balsa well etc? Will it work as an adhesive?

I am making wheel pant pockets if you will. If I spread a thin layer of bondo on the pocket and then push the fiberglass wheel pant into it; will it provide a good strong hold?

Thanx in advance!
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Old 05-01-2007, 01:49 PM   #2
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I've used it for shaping balsa-clad aluminum tube when making struts. Worked well but it is heavy....
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Old 05-01-2007, 04:06 PM   #3
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Just like Jim said, it is heavy but you can make almost any number of shapes with bondo.

keep it light!

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Old 05-01-2007, 04:27 PM   #4
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Ok lets put some light on this I assume you are using the word Bondo as a generic term and not a brand name. Try and find some Half Time it is a two part polyester putty(same as bondo but finer)it is also extremely light.It comes in a can about the diametre of a gallon but only 3" high The bigest problem I found is even though this stuff is easy to sand balsa sands easier or is softer. Mask the balsa around the putty and sand it almost to shape then remove the tape and flare it out. Bondo or this putty would not make a good glue ,would crack and come apart at the seam. Bondo long or short hair fibreglass body filler probably would work but so would a lot of other glues you have and you wouldn't have to buy a litre or equivilant of a gallon.
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Old 05-01-2007, 07:26 PM   #5
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Can you just use 30 minute epoxy mixed with Microballoons filler? Makes it very light, thick, and sticks like a *

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Old 05-01-2007, 07:26 PM   #6
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There's an article in this months maac mag about painting. That topic includes bondo as described (not to use it, btw).
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Old 05-01-2007, 09:09 PM   #7
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If you go to a body shop paint supplier like Napa or others and not Crappy tire you can get a bondo that is not as heavy. Also if you figure how much of the bondo you have in a container for adding hardener I then add cornstarch for filler. The one mentioned in the previous post about 3 inch's high is a spot putty. No hardener in it and I use it for pin holes in glass.
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Old 05-01-2007, 10:04 PM   #8
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Spachling compound from Home Depot works very well too. Water soluble, take it out of the can and plaster it on. When you buy it you'd swear you bought an empty can.
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