clear crackle without acrylic??

[somavenus.livejournal.com]

I'd like to cover decoupaged things with clear crackle-looking sealer. Does anyone know if there's such a thing? Most crackles I've found need to be applied on top of acrylic paint. I don't want to use acrylic paint on top of the crackle (or underneath)-- i just want a clear crackled look on top of the decoupage. Would a layer of modpodge act as "acrylic" to go underneath the crackle??

Thanks!