>I have used the factory supplied 'expancell' & I am finding that whenever I
>sand the filler back to a fine layer then use my airline or a brush to
>remove the dust, a number of small 'craters' appear as if there were bubbles
>trapped beneath the filler which I am exposing. I have filled & sanded some
>of my surfaces three times now and the craters don't seem to be getting any
>less.
Richard,
You could try rolling on a thickish coat of UV Prime, then scraping most of
it off while still wet, using a rubber squeegee, the sort screen printers
use. This helps to force the filler into the bubbles without too much build up.
Europa factory used to recommend "Brushing Filler" specifically designed to
do this job and it worked well but was expensive. There used to be some
stuff from TriMite called "Ragwipe" for the same job.
I always put some Cabosil in the micro, it alters the surface tension
somehow and reduces the bubbles somewhat. West epoxy is recommended by many
experienced fillers, it sands a lot easier than the structural stuff.
Graham
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