This sounds like blushing. It is common to acrylic lacquers of all types and
can be caused by too-rapid evaporation of the solvent from the coating. This
causes a fog of condensation to form on the coating as it dries. Butyl
cellosolve or another retarder may be added to the coating in small amounts
to retard the drying time. This effect is most common in cool, damp
post-coating environments. Eliminating the moisture therefore helps the cause.

If you have affected boards to fix, contact me directly and I'll explain how
it can be very simply done.

Mike Moninger
Thermospray Company, Inc.
www.thermospray.com

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d
##############################################################
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://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################