>Subject: Re: Europa-List: filler
>
>
>Jeremy,
>Although I am not up to using expancel yet I agree with Neville and Co. that
>mixing the epoxy before adding filler is a very good idea.
>I asked Neville if there was a recommend weight ratio to the expancel and he
>said to mix it until it is like bread dough, then apply a very light coating
>of epoxy
Jeremy
I found it very difficult to mix filler by weight, the Expansel is almost
weightless, even 1/10th gm alters it. Viscocity and therefore spreadability
varies with temperature. My recipe is
1 use a bit of colloidal silica, it helps spreading and flowing
2 get it all on in the first main application, sanded filler absorbs
resin from later applications and leaves a hard ring at the
feathered edges, almost impossible to sand level.
3 I use a serrated scraper for the first coat, 2mm deep serrations,
then go over with a straight scraper and more filler to level it
out. The other way is the strimmer line technique I've described
before, that works well too on wings and things. Invented by
Ron Swinden, our first chairman
Graham
Graham
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