Silicone Coat + BGA masking

From my previous experience with silicone, it tend to be need to spray with thick coating(s) and it's more watery. The boots doesn't work too well in those cases. Just a note, now I am no longer working with silicone. For conformal coating, best masking is important, but if you have tune the spray setting right, you can cut down some of the masking headaches too. My approach to the watery material issue would be try to play with pressure ratio; increase more air pressure and lower the fluid pressure (as dry as possible), doing so should helps.

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