I support point of knife trimming. The results are far superior to
anything you can do with any grinder, and it is very easy to do.
However... The timing is absolutely critical. There is a point in time
during the curing process where the layup is sort of rubbery. A sharp
utility knife will quite easily cut it and leave a beautiful edge that
requires no grinding at all. No, it won't 'bugger' up the layup.
Sometimes it isn't even necessary to sand the edge. I used this process
for all my closeouts. Again... the key is timing, timing, timing.
Jeff
bizzarro@easynet.co.uk wrote:
> Hi Rowland
>
> I have used the little angle grinder wheels for the dremel and they
> work very well. They seem to be more balanced than the permagrit
> although that too has its uses.
>
> What is the point of knife trimming anyway? It just appears to bugger
> up the layup that you spend so long perfecting. I tried it only
> twice, then reverted to the Dremel or craft knife and metal ruler or
> pad saw.
>
> all IMHO
>
> Ed
>
> > However, being a stubborn animal, I have since tried trimming my
> > layups with both the Dremel (with a Perma-Grit wheel) and the
> > aforementioned 115mm angle-grinder & diamond wheel. I find the
> > angle-grinder much easier to control (I feel I'd do better with the
> > Dremel if its wheel ran at right angles to the body, too), and it
> > goes through with pretty much undetectable effort.
> /////Eddie Hatcher Bill Lams Nick Crisp///////
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