I have found Dow Corning 1-2577 Low VOC conformal coating , a silicone product, to be very resistant to solvents of many varieties. You might try this as an overcoat. Jon A. Moore TRW >>> Ferrell-2 Bobby <[log in to unmask]> 01/28/98 07:22am >>> Hello Technetters, Any suggestions on the following problem would be greatly appreicated. We are manufacturing/assembling small amounts of custom boards in house and are having a problem with the ink stamped serial numbers on the board. We have tried several different types of coatings (epoxies, varnishes, etc.) to try and protect the ink stampings from coming off. The difficulty that we are having now is that during a cleaning bath in 200 proof alchol the epoxy is peeling off. Does anybody out there have any suggestions as to what to use to protect the ink stampings. TIA, Bob Ferrell NASA MM-G1/G3 Kennedy Space Center, FL. 32899 407-867-6678 > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################