I like the linseed oil but others will have their preference....perhaps due to location.
No matter what you use be sure to soak the ends very well. A friend of mine long ago told me to stand the boards in a bucket of what ever preservative you use and let it soak overnight. Most problems start on the ends and start cracking and turning black.
......I do put a coat of Spar Varnish on it as it will expand/contract a little without cracking and letting moisture in.
Oops, I just noticed you have already installed....but recommends are the same.
Last edited by Achipmunk; 07/07/2021 7:26 PM.
