You can use spray mount, but remember that spray mount is a more permanent adhesive. You really need to get your hands on some 3M ReMount. I bought mine online, as that was the only place I could find it.
That's the cheapest I found online about a year ago when I searched. And Cheap Joe's has excellent customer service. I was sent a bottle of 3M Spray Mount and they allowed me to keep that bottle and sent me the good stuff. Very kind people.
The effects are worth it, I suggest you pick some up.
I use this product a lot on magic effects that need repositioned. It dries almost like a sticky note adhesive. Shane Black got me hooked on this product for magic effects a few years back. I always used it on my Warning labels for Kostya Kimlats effect.
I did also buy the 3M Spray Mount and used that on some card effects.