Halloween makeup: Greyscale! (help)

So me and hubby are going as an old Hollywood black and white couple for halloween! I got some great stuff and put together a quick face just to test it all out (sloppy, but you get the gist):

I've never actually used a setting sprat before, and I'm beyond paranoid about it rubbing off. Especially on the hands and such. Recommendations? I was going to grab some of the urban decay up all night, but I've heard a lot of mixed things. Thoughts?

Love that idea for Halloween!
Not sure if this would apply to your costume makeup, but I use both Fix+ by Mac and the All Nighter by Urban Decay. The Fix+ does not really hold you makeup in, but perfects it in a way to look like dewy skin. I do find the the All Nighter does help keep my makeup on longer, but I am not sure that it is the best long lasting spray on the market because I have not tried others. Good luck!