Looks like my new 7x14 comes in next week. Plywood walls and Rainblock engineered flooring. What do you guys recommend to protect both surfaces? I am not as concerned with the flooring as it is waterproof and will not warp, but should I still use something for non-slip (esp. the drop down gate?) What would be the best thing to do with the walls? Paint? Waterproofer? Stain? Thanks.