So i got some 2x12x12 from my uncle to make some raised beds. He had used them for a sidewalk he poured so i was going to scrape the lil bit of concrete off. He just told me they also brushed on some motor oil on all the wood. Really dont want this wood to go to waste. Is it alright to use it for my garden boxes or do i have to do something to it in order to use it.