[TowerTalk] Pencil Marks.

[Ronald A. Stunden]

Most likely the pencils that were use ,Were soft carbon, as sometime used
by art'ist, they will work even under paint. Its not very nice to have a
round peice of .020 skin fall out of the side of the aircraft when your in
the air.!!
Also never scratch alu, it wil work and spit..

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