stock trailer question

[TddWil@aol.com]

We got a new 12 ft steel stock trailer least year. It "put a hurtin" on the 
budget so the only extra we got was rubber mats. The wall are not lined. My 
friend that has done body work for many years said that plywood would hold 
moisture and rust out the bottom of the walls. The walls get a bit scraped up 
from hooves along the bottom. (which will rust anyway if its not touched up) 
Has anyone tried spray on bed liner on the walls? Or maybe putting 
undercoating on the walls and then plywood? It would be salt treated 
plywood.Also I need to cover the sides, but plexiglass doesn't sound easy to 
put in and take out if you need to change things on the road. I saw one stock 
trailer with heavy clear vinyl that snapped on, like the stuff they use on 
boats. This trailer has to last a long time so I want to do all I can to help 
preserve it in all its pristine purpleness!

                                           Shelly in DE