I like making signs
Hi I have an order for a 4'x6' "For Sale" sign. They would like it installed with 4x4 posts. I was thinking of using 1/2" MDO with aluminum sign screwed to it and then 2 posts in the ground (as suggested by customer). I would assume I should put them 3-4' in the ground without cement. In WI. Do I need to do anything with the MDO to seal it? Do I need 2x4's behind on top and bottom for a brace? Thanks!