greetings, I am trying to get some practice shaping and glassing so I can make a board or two for my son and his cousins. I really want to get some experience with a cheap homemade blank from Home Depot before I ruin a $70+ Clark blank. The foam at Home Depot is 1"x4’x8’, but it seems to be the same kind of foam as cheap coolers are made of. It doesn’t really seem like it would plane or sand too well- it looks like big chunks would tear out of it if I worked it with tools. Would this be the case, or has anyone else used it and had it turn out okay? Home Depot also offers a pink foam that is about 1 1/2" thick, but it feels kind of slick and flexible- otherwise it seems like it would shape better than the white foam. Any help would be great.