Sorry about the double post Beth. Wasn't sure which thread to post in. I am an interior painting contractor who knows everything about interior work but very little about decks, exterior forces, mold and pressure treated wood. I now use AC stains on my own cedar deck after many mistakes in the past and am happy now due to the information gained from this website.
This project is for myself so I am a DIY. If you have time to expand on why you think acrylic would work best, I would appreciate knowing. Acrylics do work better for mold and breathing, maybe that's the direction for your thinking? Also, are you thinking solid or semi? I think I would prefer penetrating the wood and not something that could peel but I could be wrong. Also is Oxy Clean a good idea? Again we are not looking to win a beauty contest here, unlike my deck. Longevity and minimal maintenance is the goal. The stringers may be the first thing rot.
Thanks in advance for your help.