Congratulations on the purchase; looks great! Keep the decals on though. In regards to paint protection over the decals, I chose a local person who primarily uses Opti-coat Pro+. He stated, it wasn't certified to be used on anything that wasn't clear-coated, therefore the decals remained coat-free, with little to no paint correction applied to the vinyl. I use a good quality spray wax over the decals. I am not sure if Modesta is directly applicable to the Optimum product.