Hey ya'll

I have about 20 Oak beams varying from 6x4 to 8x8 that are rough cut and very gray from being out in the weather for a couple of years.

I'm getting ready to build and I want to clean them up first (that is, I would like a nice light color with the wood grain showing). I remember hearing someone talking about using some type of chemical to refresh the wood and I have also heard about using a pressure washer, but I'm skeptical that anything could take off the gray and remove the sawmill marks as well as a power planer. However, I figured I should ask before I pull the trigger.

thank you! (I did search the forum first)