on 11/15/03 5:41 AM, Graham Singleton at graham@gflight.f9.co.uk wrote:
>
>> Do not bother with colloidial silica, we did some ''blind testing'' with a
>> number
>> of people once, non could tell any difference, I believe the placebo
>> principle
>> works here !
>> Do not muck about with all this fishing line nonsense !
>> If anyone needs further details on this subject, get back to me
>
> It's not often that Neville and I disagree, however,,,,,,,,,,,,, on the odd
> occasion we diverge slightly
>
> Colloidal silica, (Cabosil) allows more Expancell to be added without loss
> of spreadability, or if you prefer, better spreadability with the same
> ratio of resin/expancell. Try this Neville, mix up some resin and filler,
> now mix in a spoonful of Cabosil, tell me (privately {:-) if it spreads
> easier?
>
> I don't see the point of 1/4 inch thick filler, except to be sure there are
> no areas that are too thin. I use 1 1/2 or 2mm strimmer line as a thickness
> gauge. After half an hour over again with the spreader to fill in the tram
> lines without adding any more filler.
> Obviously you can't use this method on steep curves, then I use a serrated
> scraper for the first fill, then smooth ove after it settles a bit.
>
> I'm not as young or strong as Neville is so I tend to avoid hard work.
> After an overnight cure I then trim off the excess with a small, very sharp
> wood plane, (thanks to Kingsly Hurst for passing on that idea). It gets rid
> of the outer skin which clogs the paper unless you wait three days. I hope
> this helps understanding a little more?
>
> Graham
>
>
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The point I think Nevel is making is up to a 1/4 of an inch. From one that
is done filling and sanding I will say he is right. When you try to put on
the minimum you end up re-filling waiting for cure then re-sanding. It takes
longer! Just make sure to fill until you cant see the weave anywhere. If it
ends up being 1/4 inch its OK! Easier to sand off a lot once than to
re-fill & sand. I did it both ways. Like the second better.
Jeff
Tri Gear A258
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