Sure you can. Lots of outdoor pallet projects look better with an aged board. As long as the wood is solid, they are still great for projects. If you don't like the color of the pallet wood, you could plane or sand the surface, then stain or paint the wood. At the moment, I'm just more into the building of useful items and not caring too much about the looks, meaning I'm not spending any time on sanding, planning, staining or painting. Don't need those extra efforts on the outdoor projects I am building.
thanks. I don't mind the looks either.