I was wondering what materials should I use for a backing plate for some new stanchions I have. They have a slightly different bolt pattern than the bases they are replacing so the plates can't be reused. I would like something that looks OK, too. Would starboard be OK since it's not something that needs to be glued in place? If yes, then I'll probably go with cutting board plastic since it doesn't need to be UV protected. What are some of my options?