First use TINNIT Bright Tin Plate No. ER18 (cheap and does the job) available at Circuit Specialists and Jameco. A better tin plate already mixed can be found at JDR Micro Devices. Then use M.G. Chemicals Conformal Coating which is a flexible (...) (25 years ago, 9-Apr-99, to lugnet.robotics.handyboard)
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