What options are there to install 24×34 wedding portrait prints?

In about four months I have a wedding shoot. The couple requested a 24×34 print. Usually I order my 20x30s on a single & double weight matboard, but I feel like the print itself can easily get scratched. Many local photographers print on a foam type that has a waterproof print that feels like plastic when touched. It's something I might want to go for. What other options, pros and cons, should I consider?