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PVA and Balsa sawdust.

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SONNY MONKS24/01/2019 14:43:41
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269 forum posts

It makes an excellent filler,if any of you havent tried it yet gents.

gangster24/01/2019 16:05:15
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999 forum posts
17 photos

I have used it but not sure how well it sands. I have also used wood dust and cyano this works well but can be very hard

Percy Verance24/01/2019 16:14:30
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8108 forum posts
155 photos

Possibly a better combo would be aliphatic and sawdust given that aliphatic dries harder, making it better to sand........plus aliphatic has superior penetrative qualites, so gives a better joint over pva.

I'd be wary of mixing balsa dust with cyano to fill gaps gangster, as cyano creates fairly brittle joints to begin with and any impact would probably shatter the joint.

Edited By Percy Verance on 24/01/2019 16:15:49

SONNY MONKS24/01/2019 16:53:55
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269 forum posts

Hi Percy,Ive never used the aliphatic pva,whats the difference with white pva?

Former Member24/01/2019 17:15:33
1322 forum posts

[This posting has been removed]

SONNY MONKS24/01/2019 18:07:54
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269 forum posts

okay thankyou.

FlyinBrian24/01/2019 18:17:50
543 forum posts

As an aside

small dings and dents in balsa can be filled by sanding with fine sane paper around the area then apply a drop of cyano to the ding and sand again making sure you get the sanding dust into the ding, it may need a couple of goes but the result is almost invisible.

Percy Verance24/01/2019 18:26:47
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8108 forum posts
155 photos

SONNY

It isn't aliphatic pva Sonny, It's a different formulation altogether, and is simply known as Aliphatic Resin. Titebond is perhaps one of the more popular aliphatic brands, although there are others too........

SONNY MONKS24/01/2019 19:42:20
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269 forum posts

i was looking at titebond percy,seems a good popular brand.

Percy Verance24/01/2019 19:48:27
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8108 forum posts
155 photos

It is Sonny. I've used Titebond for a decade or two now. There is also a waterproof version, which I'm told is a favourite of model boat builders..........

Braddock, VC24/01/2019 20:49:11
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1645 forum posts
82 photos
Posted by FlyinBrian on 24/01/2019 18:17:50:

As an aside

small dings and dents in balsa can be filled by sanding with fine sane paper around the area then apply a drop of cyano to the ding and sand again making sure you get the sanding dust into the ding, it may need a couple of goes but the result is almost invisible.

Soak the affected area in water, use your covering iron up high or your heat gun and the dent will magically disappear, as long as the grain isn't torn.

I use this method on dents in my gun butts and thought if it'll work on walnut should work on balsa.

Ben B24/01/2019 22:32:07
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1421 forum posts
4 photos
Cyano and sodium bicarb makes a rock hard filler. Strong but a pain to sand. Very exothermic reaction also.
onetenor25/01/2019 00:41:37
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1901 forum posts

Water and heat also works on wooden baseball bats. Damp cloth a hot poker in my case.

Stearman6525/01/2019 07:20:03
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769 forum posts
893 photos

Back in the day, I used talcum powder mixed with clear dope, then the wife complained I smelled like a knocking shop & reverted to powdered french chalk.wink

SONNY MONKS25/01/2019 07:47:43
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269 forum posts

hahahahahaha i like that comment stearman.

Ian Ross 125/01/2019 08:19:35
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18 forum posts
4 photos
Posted by onetenor on 25/01/2019 00:41:37:

Water and heat also works on wooden baseball bats. Damp cloth a hot poker in my case.

Hot water (near boiling) also works well on foamies, really good at straightening a bent nose after an unexpected arrival.

Former Member25/01/2019 11:01:38
724 forum posts

[This posting has been removed]

Bob Cotsford25/01/2019 11:13:33
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8261 forum posts
454 photos

Laminating resin and lots of microballoons, if you mix it thick enough it still sticks like wotsit to a blanket but also sands nicely

Bruce Collinson25/01/2019 13:26:18
476 forum posts

Best by far without resorting to the alchemy suggested above is Pollyfilla Advanced. It comes pre-mixed, tube or tub, it fills and smooths very well, has far less tendency to lift off than specialist lightweight fillers, dries quickly and sands easily (often not needed because it smooths so well) and it's cheap.

BTC

Martian25/01/2019 13:40:51
2385 forum posts
1126 photos
Posted by Bruce Collinson on 25/01/2019 13:26:18:

Best by far without resorting to the alchemy suggested above is Pollyfilla Advanced. It comes pre-mixed, tube or tub, it fills and smooths very well, has far less tendency to lift off than specialist lightweight fillers, dries quickly and sands easily (often not needed because it smooths so well) and it's cheap.

BTC

And after a light sanding a coat of non shrinking dope

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