Oil-based polyurethane over paper decoupage?

I'm thinking of decoupaging a formica table I have using pages from old books. (After some research into the durability of painted formica, I think the decoupage may actually hold up BETTER to scratches, and I figure if I seal it well it'll be fine.) I'm a little concerned about the durability of water-based sealants, though, and I suspect oil-based varnish would hold up better. But is it going to eat through the paper or anything weird like that? If I seal the paper well with acrylic medium first, can I use an oil-based polyurethane over it? Will it adhere, and if so will it do any damage to the paper below? I really like this table and I don't want to ruin it.