Has anyone used one of the micro shot blasting systems for removal of
conformal coating?

I have some concerns about static and the residue left behind. We use a
moisture cure silicone coating, so abrasion works well to remove it, but the
dry powder in the air stream must produce high static charges and if it is
not possible to wash the assembly the shot residue will be left behind.
There are multiple different shot materials offered including walnut shell,
plastic pellet, and sodium bicarbonate. Since powders are difficult to
remove from the soft silicone coating, are there any of these materials that
a trace residue left behind would not cause reliability issues?







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