Model Railroad planning help.?

Question by .:-{Zach}-:.: Model Railroad planning help.?
Hello, I am currently planning to build a n scale layout that is about 3×3 ft with possible extensions. Iam using particle board, but I am not so shure now if its a good idea to do so because it was in the rain for about a day, however its all dry now. Would it be better to use plywood instead? Or just go with the particle board?

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