I bumped into this excellent guide to QFN Soldering, enjoy!.
http://hackaday.com/2010/05/04/qfn-or-mlf-soldering-without-solder-paste/
I bumped into this excellent guide to QFN Soldering, enjoy!.
http://hackaday.com/2010/05/04/qfn-or-mlf-soldering-without-solder-paste/
One of my favourite sites 
That aside, I think it is worth getting a single syringe of paste if you have a hot air tool anyways instead of doing this.
You can get lead-free paste on a manual syringe for quite cheap nowadays.
But this will of course work in an emergency.
Elias
