I don't use anything on my sub-flooring. However,if you were to use paint I am sure it would make it last longer.
I do want to tell you that sub-flooring is not really osb make sure that you ask for sub-flooring it is compressed wood pieces but it is more compressed and smaller pieces of wood. You will need to put support under it.

I do not know the price of it where you are but here I pay about seventeen dollars a sheet. 4 by 8

My favorite outdoor bin is made of dry stacked cinderblock. It's inexpensive, easy to set up and no deterioration.

Hi; redhen glad to see you still take time to check in on some of the forums. The posting has been very qiuet on most of them. a very long pause from what I see. Very few discussion goimg on.

I want to make a bin for inside my worm house and perhaps make it convertable to a folw thru if the harvesting becomes a problem. I already have some framing I can use. I have so many 10 gal bins going at this time I only have 1 or 2 spares and only 1 or 2 of the 18 gal ones. I am in the process of harvesting and deviding so if I put 3 or 4 wood bins togather say 2.5'X8' I will be able to reach everything from one side and can keep them close to a wall.

Now the bins are stacked on top of each other so at feeding time I have to handle each of them twice for the process. I need to do less handling.

well when I was talking wood bins they are in the shed. I have 14 2'x4'x1' two high and built like shelves. so they get no weather. I did build a heating system this year. I lost about seventy pounds of worms last year during a freakishly cold winter. I ran metal conduit through the beds and have an old six gal. water heater that I will heat with a wood fire and pass steam through the beds to maintain a good temp. I hope I will work for me. I don't see why it shouldn't will let everyone know how well or poor it does. I figure I will only have to fire it up once or twice a week at the most.