decking oil

Hello all, DIY-ers here and tomorrow we are embarking in our first deck build project. Two questions that have been going through my head on the deck end finish and also protecting the cut timber ends. I understand that a great (the best?) way to protect a finished decking is to use decking...

For softwood decking, reclaimed. Flat side up and will be sanded before application. Top priority is ease of re-treatment as it's in a very exposed location. I've read that solvent based oil is better, as it penetrates further, and if I read correctly, is simpler to re-treat in the future. But...