On 10/18/2024 10:38 AM, Oscar Zuniga via KRnet wrote:
You mention not to hot-wire it as one limitation to working with it
but I would add another: the stuff is very unforgiving of being
bumped, scratched, or bent, and it demands that it be sanded very
gently. Once it's glassed, it's great- but the bare foam requires
tender handling. You can sand it with anything, even with a chunk of
itself, using very little pressure.
Oscar Zuniga
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Expanding on the hot-wire limitation, if done it emits a poisonous gas.
As for easily damaged, it is also easily repaired. A damaged area can
be cut out and a plug of the same material can be inserted and sanded to
shape. One caveat, don't let any glue line extend through the desired
finish level. The glue doesn't sand at the same rate as the foam and
you have an issuer to correct.
Also, if you have an area where the glass will extend from the foam
across an area (wood) that the glass will be bonded to, keep the foam
surface a fraction above the wood ( as in the wing skin crossing the
spar). It is easier to fill the spar small surface area a fraction to
bring up to the correct level after cured than to bring the larger wing
area up to a slightly high spar and keep the wing contour correct.
As always, YSMV...........
Larry Flesner
--
KRnet mailing list
KRnet@list.krnet.org
https://list.krnet.org/mailman/listinfo/krnet
