Thought I should share this with you,
got this idea today and had to try it out, worked like a charm!
Basically you use your vacuum cleaner and a very simple construction to build a vacuum table that will hold the stencils in place while you are working with the paste.
Eliminates the risk of smearing out the paste, especially on large PCBs with small pitch where it might be difficult to apply all the paste in one go!
Obviously it only works if you have a few vias or mounting holes...