I've tried using epoxy glue a few times, but it always turns out horribly for some reason. I just can't seem to work with the glue (plus the smell is so overpowering that I can't really take it). Anyway, every batch that I've mixed up smelled horribly for a few hours, but after that it went away (if I recall correctly). CHEWIE's idea of the matte spray might work, other than that, I'm not sure.
On a related note, I've found that epoxy glue is not really necessary, at least for most figure customs. If you use a higher quality super glue (like Zap-A-Gap or Loctite or something like that), they work just as well but without the fumes or mixing the correct ratios. If you really need a solid bond though, epoxy glue is still your best bet.