Before attaching the wood, be sure to paint it with several coats of paint. After that, I suggest using the Liquid Nails as already suggested, then the bolts or screws. Wal Mart sells an acrylic enamel for a little over 16 dollars. I just added plywood flooring and coated it with three coats....before carpeting....especially the edges of the wood and particularly in your case, at least three coats on the end grain. Do no use stainless steel bolts or screws. It sets up a galvanic response and will deteriorate the aluminum. Also, marine plywood will affect aluminum...as well as treated wood. Hope this helps...good fishing, Mac