Wrote to Zap to find out what surface CA won't stick to. They
recommended what is called Saran Wrap. Zap was right too. I taped on a grid on the back
of a piece of glass and covered it with Saran Wrap. Then when I was
scratch building masts I could use the lines to lay the cut wire I was
using nice and straight and pop a bit of CA (just a bit at first to
avoid moving anything) to get it into place. As soon as it's solid you
can put on more CA or the goop of your choice. Anyway, you can glue
something with CA laying down and not glue it to the blinking desk. CA
simply does not adhere to Saran Wrap.
Looked at a much earlier thread: I've never though of using the stuff for masking, but it might have some real use there at least for overspray protection.
Eric