I can't tell from the pics on the websites, but what are the RB and AP racks made out of? Are they painted/finished wood? Hubby's good with woodworking, so we're trying to price out if it's cheaper to build our own or buy one. I want something that will be well insulated, but I don't want to deal with melamine. It'd be helpful to know what RB and AP use, since everyone raves about them.

I didn't realize BPs would be so freakin addictive!