>Hello the Oracle,
>
>I've just attempted to surface fill my first flying surface with factory
>supplied Expancell and have a couple of questions.
>
>1). How do I judge the consistency of the mix, is it too wet if there is
>'moisture' visible on the surface?
Richard,
A few points.
Cabosil (colloidal silica) is essential. Try this. Make up a stiff batch of
Expancell, then add a little Cabosil. It will now be possible to add a lot
more Ezpancell to get back to the stiff mix. Consistent mix quality is
important but difficult to achieve because you cannot weigh the minute
quantities of Expancell accurately enough. You need to find your own way to
do this.
Much easier to sand off one thick even layer than several variable ones
that are also of variable hardness. The thickness of a nylon trimmer line
is ideal.
I prefer a flexible springy sanding spline. One that will follow the curves
without too much pressure but enough to fetch the high spots down to the
general curve. A 3 foot strip of 3" wide 1/8 2402 was ideal. Two wood
handles at the ends and bond on the abrasive with 3M adhesive.
graham
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