With some help from my wife and son in law, we got most of the first coat of paint on.
I tested the paint directly on the foam with no ill effect. Based on that and the fact that I had a good coat of Gripper for a base, I used the Oil based Porch and Floor paint.
I think it will provide a more durable finish. It went on well, and I think the second coat will completely fill in the canvas weave. Here's a teaser picture , but I haven't finished the edges of the silver yet.