OK, quick summery, lets see if I got this right.
The Q-Cel is primarily used as a micro (slurry for filling foam, dry for dings
before lay-up). But, it can be used as a final finish.
Expancel can be considered as an alternative or primarily as a final finish
only.
(Per CBM1)
SO per CBM 37-3
I would use the Q-Cel (or the 3M Glass) to fill in any dips/dents on the surface
of the cloth. Then sand it down to a point where I see the fiberglass
cloth/weave
and create a smooth even surface all the way across.
Only then I would use thermoplastic polymer microsphe res (NOT GLASS) or aka
Expancel
as the final finishing filler. Assuming that I'm not using Q-Cel as the
final filler.
Assuming that my above understanding is correct and I would purchase the 3M
Glass
Bubble from Aircraft Spruce, then I also have to purchase the Expancel (or
other thermoplastic polymer microspheres) as the final filler before paint.
Based
on the fact that the 3M is glass.
Please confirm if my understanding is correct.
One other thing that Im curious about. Per the attached pic of the pice I
snapped
off, I concluded that in this case, the bond between the cloth and filler
has failed. However, based on what I have read so far, I'm a bit taken back by
the thickness of the filler that snapped off. It is way thicker than what is
suggested in the manual, as I read it.
Do you guys agree or is that normal?
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http://forums.matronics.com/viewtopic.php?p=475313#475313
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