First off I see your in Pa if you are doing street
signs you need to obtain a PDT# (PENNSYLVANIA DEPT of TRANSPORTATION) this is absolutely required for all state roads and by most townships and cities. When you
sign up you have to get approval based on your equipment, I seriously doubt an
eco solvent will be on their list. And substraights and vinyls are HIGHLY regulated.
On a side note, I cannot figure out why people try to find cheaper alternatives or shortcuts for outdoor products. You aren't the one paying for the material your customer is & I'd bet if you asked them if they want their perminant
sign to be constructed with the best product that will definately last the longest or a cheaper product that will fail years prior for a couple dollars less, I'd be shocked if they would pick the cheaper.