A lot of rubber flyers have gone to rubbing alcohol for shrinking tissue on the idea it doesn't weaken the tissue as much as a water spray will and also doesn't expand the tissue as much.

I've used the thinned dope, glue stick, thinned white glue, and even BalsaLoc successfully.

Flying Models magazine gives quite a bit of information in it's Free Flite columns, and may even have some books available on building and covering stick and tissue models.

The Flying Aces club is also a good source of info.