Is there a pitch limit to applying solder paste through a PCB stencil by hand?
QFP-64 shouldn't be too much of a problem.  I'm doing 0.5mm pitch 100-pin packages by hand, though I do need to touch them up every now and again. 


Use stainless steel stencils, and ignore all the Kapton or other plastic sheet materials***
Use smaller stencil apertures than the default size for fine pitch components.  I find in eagle I have to use NOCREAM on the SMD pads in my library, and then manually add polygons for the cream layer.  I use a macro in Octave to build an Eagle routine to do this
Let your paste come to room temp.  I leave a blob out on a stencil and put my big stash back in the fridge.  It's faster that way.
tape the stencil down really well, and practice lifting it without smearing before spreading paste
Try to use stencils with side ridges to stiffen them and prevent bowing in the middle.
Get good with removing extra solder with braid
Be sure to leave enough space between pads on your boards to have some solder mask between them.
Pick packages with the biggest pitch you can.  The dspics I'm using come in 12mm and 14mm sizes, and I go for the 14.  By the same logic, use packages with legs you can see and get at.


***pcb-pool.com provides steel stencils free with your board order.