Brian is right....and I am not sure if hot phenol would work, AND I DO NOT WANT TO FIND OUT. Cured epoxy is much more chemically resistant/inert than FR-4, (and don't even ask about polyimide) which is why we could not strip the old two part screened on soldermasks..so even if you could "strip" it, and I am not sure that term is strong enough...the board would be history.. Then again, if you positioned the boards in the path of the Mir...? Rudy Sedlak RD Chemical Company --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------