have 183o’s cabin w. newer hickory logs added onto second story. New logs stained w. steel wool to match even the gray old logs color. Entire exterior has been treeated withh linseed oil and mineral spirits mixture (3years ago). Question: for the best preservation should i treat with the original mixture or take other steps. Some ”experts” suggest UV Protection, others say original mixture (linseed & mineral spirits). I like logs current color. Location: Western North Carolina, elev. 4200.