A few years ago, I replaced a rotten wall in a horse trailer with formply. Now I've noticed that small cracks have formed on the surface and it has bleached quite a bit. This side of the trailer has been in the sun, so it's not surprising that it has bleached. I'm a bit worried that the cracks might compromise the surface's protection against water; is there a way to oil or treat it to ensure it lasts as long as possible? Would linseed oil work (I have both cold-pressed and boiled at home)? I'm mostly concerned that some oils might negatively affect the surface.
