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Posted by RF on May 21, 2008, 7:07 pm
Peter Huebner wrote:
> void@voidacious.net says...
>> I'm using some Ronseal diamond hard satin clear 'water based' varnish on a
>> table top. It says on the tin to use a *synthetic filament * brush, which
>> is annoying, since all my brushes are bristle.
>>
>> Would using a synthetic brush make any noticeable difference to the final
>> finish? Anyone know why they would recommend a synthetic brush please?
>>
>
> I've ruined a perfectly good high quality bristle paintbrush
> with water-based polyurethane. (didn't say anything about it on
> the tin, unfortunately). The stuff just goes off in the higher
> parts of the brush. Also it doesn't flow out very well, which
> makes for a patchy/streaky finish. It flows much better out of
> synthetic brushes and it doesn't stick to the filaments the way
> it sticks to bristles, so you don't end up chucking your
> favourite finishing brush after the first coat.
>
> -P.
>
I recommend a Syntox brush made by Purdy, these are made for what you
are doing. You have to work really fast with water based products to
avoid lap marks. A spray gun would be better if you can use one.
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