I have some red oak boards that have small splits in the wood. These small splits do not go all the through the wood. I have quite a few boards and I was wanting to join some together to use for some doors. They are beautiful looking boards, other than these small splits. I saw in one of my magazines a while back that there was a paste(?) that is good for rubbing over boards to fill in pits/holes/splits. Does anyone have any recommendations? I am not sure I want to use regular wood filler? I am new to woodworking, so am looking for advice.