I was just in my back yard a few minutes ago and I have an old fiberglass truck cap that has been sitting around for years. The garbage man won't take it and it's just sitting there so I was wondering, if I drill holes in the roof and flip it over could I use that as a raised bed garden? I think it would work good. I was just wondering. I still have quite a while before growing season so any advice is appreciated. Thanks, Dom.