My utility trailer has treated wood on it's deck and I just let that weather which has stood up for years. I will say that I'm a big fan of Thompson's Water Seal because I put two coats on our weathered dock up north after I pressure washed it and it gave it a new lease on life and sheds water like a duck's back.

My other auto is a .45

The bitterness of poor quality is remembered long after the sweetness of low price has faded from memory