Electronic Contact Cleaner(car care) Ideal for cleaning PCBs and metals that are not sensitive to alkalis. Ideal for cleaning PCBs and metals that are not sensitive to alkalis. Used for cleaning metals prior to plating operations to provide an extremely clean and slightly roughened surface, allowing excellent bonding of the plated material. SWA will not normally attack sensitive metals unless they are cleaned many times or unless the units are immersed for an excessive cleaning period.Electronic Contact Cleaner(car care)