We built a log home 9 years ago; the first time we brushed on a coat of all purpose exterior oil base Menards stain 5 years later we sprayed on the same stain. I don’t like how the East has weathered and looks dry. Some one recomended Sikkens brand stain but I am unsure of how to prepare the surface for new stain. What is the best prep and best stain. Does a clear coat help with the dry look. We have areas that are black and run from some nails. I saw you stated sikkens brand needs an app